Unit 5【知识梳理】——2022-2023学年八年级下册单元综合复习课件PPT

这是一份Unit 5【知识梳理】——2022-2023学年八年级下册单元综合复习课件PPT，共60页。PPT课件主要包含了过词汇，单词过过过，过短语，短语过过过，根据汉语提示完成句子，过句型，句型过过过，过语法，语法定义，肯定句等内容，欢迎下载使用。

Review the wrds
根据汉语提示，写出相应的单词1．开始________2．在很大程度上；大量地 ___________3．突然；忽然___________4．奇特的；奇怪的________5．暴风雨_________________6．风________7．光线；光________
strm/rainstrm
8．报道；公布________9．地域；地区________10．木；木头________11．窗；窗户___________12．火柴________13．敲打；打败________14．倚；碰；撞___________15．睡着________16．升起；增加；提高________17．倒下的；落下的________
18．覆盖着冰的；冰冷的________19．开玩笑；欺骗________20．理解；领会；认识到___________21．章节；段落___________22．学生________23．彻底地；完全地______________24．沉默；缄默；无声___________25．不久前；最近___________26．日期；日子________27．塔；塔楼________28．实情；事实________
Ⅰ.根据句意及汉语提示写出所缺的单词
1．There was smething wrng with my ________(闹钟), s I gt up late this mrning.2．The sailr fund smething ________(奇怪的) at the bttm f the river. 3．When spring cmes, trees and grass ________(开始) t turn green.
begin/start
4．Earthquakes always happen ________(突然), s it is difficult t knw when they cme.5．They cntinued playing sccer n the playgrund thugh it was raining ________(大量地)．
6．Paper is made frm ________ (木头). 7．It's getting dark. Please turn n the________(灯). 8．Please clse the dr and the ________ (窗户). 9．He wn first place because nbdy culd ________ (打败) him. 10．I dn't agree with yu. In fact, I am ________(反对) yur plan.
11．—What were yu ding when the ________(暴风雨) came? —I was sleeping. 12．We are raising mney fr the children in pr ________(地区). 13．Lk! Smke is ________(上升) frm the chimney. 14．He wanted t make a fire but he fund the ________(火柴) in his pcket were wet.15．Dn't believe him. He is just ________(开玩笑).
16．What d yu think f the ________ (事件)?17．What ________ (发生) t her last week?18．Yu can't ________ (错过) the early bus.
19．When I gt t the statin, I ________(意识到) I had left my ticket at hme.20．Althugh she was very shy, she entered the singing ________ (比赛)．
21．The Eiffel ________(塔) is in Paris.22．—What's the ________(日期) tday, Millie? —It's 17 June. Oh, tmrrw is the Dragn Bat Festival.23．They didn't say anything. They went hme in ________ (沉默).
24．They have been having a difficult time ________ (最近). 25．I am ________(完全地) wrng fr sure. I have t d the research frm the very beginning.26．He refused t tell me the ________ (实情).
Ⅱ.用所给单词的适当形式填空
1．I ________ (hear) the news when I was n my way hme.2．I am really against ________ (d) that.3．I fell ________ (sleep) while ding my hmewrk.4．While we __________ (have) dinner, the telephne rang.5．What ________ yu ________ (d) when yur mther came back?
were having
6．It's a ________(wind) day tday. 7．She wants t be a ________(reprt) when she grws up. 8．Yu must drive slwly n the ________(ice) rad. 9．The man was s tired that he fell ________ (sleep) at nce.
10．Please remember ________ (clse) the dr befre leaving. 11．Mike was ding his hmewrk while Kate ________ (ck) dinner. 12．Many peple are against ________(build) a new z in the twn.13．The grund was cvered with ________(fall) leaves.
Review the phrases
1. 确信;确认2. 拍打… …3. 进人梦乡；睡着4. 逐渐变弱；逐渐消失5. 醒来6. 一团糟7. 使……分离8. 在困难时候9. 当时候10. (闹钟)发出响声11. 洗热水澡
beat against...
fall asleep
break.. . apart
in times f difficulty
at the time f
take a ht shwer
12. 错过公交车13. 接电话14. 使……靠拢15. 在这个地区16. 错过这个事件17. 在路边18. 动物保护热线19. 走路经过20. 在某人去……的路上21. 听到这个消息22. 历史上的重大事件
miss the bus
bring... tgether
in the area
miss the event
by the side f the rad
the Animal Helpline
make ne’s way t...
hear the news
imprtant events in histry
23. 例如24. 被杀害25. 50多(岁）26. 一个小学生27. 通过广播28. 沉默;无声29. 最近地;新近30. 世贸中心31. 拆除;摧毁32. 对……有意义33. 记得做过某事34. 首先;最初
a schl pupil
mre recently
the Wrld Trade Center
have meaning t
remember ding sth.
1．My sister was ____________(等待) the bus at the bus stp.2．He was late fr class this mrning because his alarm didn't ____________(发出响声)．3．Why didn't yu ____________(接电话) my call this mrning?4．Peple like t ______________(洗热水澡) in winter.5．It is t late, and I must g nw. I dn't want t ____________ (错过公共汽车)．
6．当我姐姐正在写作业时，我正在打篮球。 I ______ _______ basketball _______ my sister _______ ________ hmewrk.7．当暴风雨来的时候，他正在回家的路上。 He was n his way hme ______ _______ _______ _______ the rainstrm.
was playing
was ding
at the time f　
8．这些孩子如此兴奋以至于没有注意到一场大雨就要来临。 The children were ________ excited ________ they didn't ntice a heavy rain was cming.9．昨晚8点我打的电话，但没人接。 I called at eight last night, but nbdy ________ ________.10．这些天玛丽正忙着准备考试。 Mary ________ ________ ________ fr the exam these days.
picked up
is busy preparing
11．仔细检查你的作业， 确保里面没有任何错误。 Check yur hmewrk carefully t ________ ________ there are n mistakes in it.12．夜幕降临，强风正逐渐减弱。 The night was falling and the strng wind was ______ _______. 13．你的卧室很乱，你最好打扫一下。 Yur bedrm is ______ ______ ______. Yu'd better clean it up.
make sure
dying dwn
in a mess
14．他看了看墙上的画，决定买其中的一幅。 He ________ ________ ________ at the pictures n the wall and decided t buy ne f them. 15．只有在困难的时候，你才能看出谁是你真正的朋友。 Yu can see wh are yur true friends nly ________ ________ ________ difficulty.
tk/had a lk
in times
16．昨天晚上发生了什么事？ ________ ________ ________ last night? 17．我看到马路的另一边有一条狗。 I saw a dg n ________ ________ ________ ________ the rad. 18．那时我们正在公共汽车站等迈克。 We ________ ________ ________ Mike at the bus stp at that time.
What event happened
the ther side f
were waiting fr
19．哪个队赢了昨天的篮球比赛？ ________ ________ ________ yesterday's basketball match? 20．篮球比赛开始时，她仍在去学校的路上。 When the basketball cmpetitin started, she was still ________ ________ ________/ ________ ________ ________t schl.
Which team wn
her way n her way
21．起初，我并没有注意到那个标志。 ________ ________， I didn't ntice the sign. 22．那些旧的建筑物将会被拆除。 Thse ld buildings will be ________ ________. 23．现在，汤姆很难思考这个问题，因为他太紧张。 Nw, Tm _______ _______ _______ abut the questin, because he is t nervus.
At first　　
taken dwn
has truble thinking
24．我不记得我那时正在做什么。 I dn't remember _______ _______ _______ _______ at that time. 25．我向窗外看，看到了几只漂亮的鸟。 I _______ _______ _______ the windw and saw several beautiful birds. 26．他太害怕了，以至于摔倒在地上。 He was ________ ________ ________ he fell dwn t the grund.
what I was ding　
lked ut f
s scared that
Ⅱ.从方框中选出合适的单词或短语，并用其适当形式填空
1．Nne f them talked. They finished their meal ____________．2．We were ____________ that the Wrld Trade Center was taken dwn by terrrists n September 11, 2001.
in silence
have meaning t, tell the truth, in silence, take dwn, shck
3．The Whites decided t ____________ the ld huse and build a new ne.4．Dn't lk at me like that! I am ____________．5．The Spring Festival __________ many Chinese peple, because the family members can get tgether during the festival.
telling the truth
has meaning t
Review the Sentances
My alarm didn’t g ff s I wke up late. (教材P34 2a)
g ff 在此处意为__________________，是不及物动词短语。
【拓展】g ff 的其他常见含义：
g ff还可意为 ______；____________________；_____________________
(食物/饮料)变质；变坏
(电灯)熄灭；(电)中断
如：我已把闹钟定在早上7点响。
I have set the alarm clck ________ at 7 a.m.
He ________ early this mrning.
Meat __________ easily in ht weather.
Suddenly the lights ___________.
My alarm didn't g ff s I wke up late. (教材P34 2a)
wake up 意为___________。wake sb. up意为____________。wake up是____________型短语，后接名词作宾语时，名词可放在wake与up之间或up的后面；后接人称代词作宾语时，应将人称代词_________________。
放在wake与up之间
如：当他醒来时，太阳正在升起。
When he __________, the sun was rising.
露西每天早上6点钟醒来。
Lucy ___________ at six 'clck every mrning.
他妈妈经常早上5点钟把他叫醒。
His mther ften _____________ at 5:00 in the mrning.
wakes him up
I was waiting fr the bus when it began t rain heavily. (教材P34 2a)
begin作动词，意为________，同义词是_____。常见用法有：begin t t sth.=begin ding sth. 意为____________;begin with 意为___________; t begin with 意为_____________; 相当于at first.
如：他在桌子旁坐下开始写字。
He sat dwn at the desk and _____________ t write.
她25岁时开始教英语。
She _____________ teaching English at the age f 25.
The party ___________a game.
首先，我们必须考虑乘客的安全。
began/ started
began/started
______________, we have t cnsider the passengers’ safety.
T begin with
I still missed the bus.(教材2a 听力)
❶ miss在此句中作及物动词，意为_________________。
❷ miss作及物动词时，还可意为_______________。
❸ miss作及物动词，意为_____________。
❹ miss首字母大写时，Miss意为_______________。
如：快点儿，否则你会错过早班车的。
Be quick, r yu ____________________.
他走了以后，她会想念他的。
She _____________ when he leaves.
那个男孩儿上学期经常缺课。
The by ften _____________ last term.
will miss the early bus
will miss him
missed classes
But I culd hear the heavy rain against my bedrm windw. (教材1b 听力)
against作介词，此处意为__________________。against作介词，还可意为______________。
如：把钢琴放在那里，背靠着墙。
他靠(lean)着树。
He leaned _______________.
Put the pian there, with its back _______________.
They are ________________.
against the wall
against the tree
against the plan
Yu're kidding! (教材P36 4c)
kid作动词，意为“开玩笑；欺骗 ”，其现在分词为kidding，过去式和过去分词均为kidded。
如：我不是故意的。我只是开玩笑。
I didn't mean it. I ________________.
别骗自己，他会改变的。
Dn't _____________ (that) he'll change.
【拓展】kid还可以作名词，意为“小孩”，复数形式为kids。正式用语或书面用语中用child表示。
They've gt __________.
He is just a __________.
was nly kidding
kid yurself
Ben was helping his mm make dinner when the rain began t beat heavily against the windws.
beat作不及物动词，意为_______________________________________。beat作及物动词，意为_______________。其过去时为________其过去分词________。
“敲打;(多次或连续)撞击,拍打;(心脏、脉搏等)跳动”
The rain _________________________________.
Jennifer's heart ____________ fast.
Wh's ___________________?
我们以10比4打败了他们。
We ___________ by 10:4.
is beating heavily against the windw
was beating
beating the drum
win意为_________________，指在竞赛或战争中获得胜利，其宾语多为表示________________________等的名词。 beat意为_______，指在__________中击败对手，其宾语是比赛或竞争的______。
比赛\战争\奖品\金钱\奖牌
【辨析】t，als，either与as well
t，als，either与as well都可意为______，其区别如下：
系动词、助动词或情态动词
如：我8点钟又打电话，你那时也没接。
I called again at eight and yu didn’t answer then, _______.
She speaks English and she ____speaks French.
He has t g ________.
Nice t meet yu, ________.
With n light utside, it felt like midnight.(教材P35 3a)
❶ light作不可数名词，意为________________。
如：他在烛光下读那封信。
He read the letter by ____________________.
❷ light作形容词，意为_______________。
如：那个箱子是重的还是轻的？
Is the bx ______________?
Yu lk nice _______________.
❸ light(lit/lighted)作动词，意为_____________。
I culdn't get the candles ___________.
the light f the candle
heavy r light
in light clrs
Ben's dad was putting pieces f wd ver the windws while his mm was making sure the flashlights and radi were wrking.(教材P35 3a)
wd作不可数名词，意为__________________。a piece f wd意为___________。wd作可数名词，意为_________，常用__________。
如：她家的房子是木头建的。
Her huse _________________.
He put ___________ in the fire.
她害怕晚上经过那片树林。
She is afraid t walk _________________ at night.
was made f wd
thrugh the wds
He finally fell asleep when the wind was dying dwn at arund 3:00 a.m. (教材P35 3a)
【易混辨析】sleepy, asleep, sleep与sleeping
如：小男孩困得在睡袋里睡着了。他现在正在睡觉。不要制造噪音
The little by was s ______ that he fell ______ in the _________ bag. He is ________ nw. Dn't make nise.
When he wke up, the sun was rising. (教材P35 3a)
【易混】rise与raise
如：昨天下午河水上涨了。
The river _____ yesterday afternn.
我回家时，月亮正在升起。
The mn __________ when I went hme.
Please ________ yur hands!
Fallen trees, brken windws and rubbish were everywhere.(教材P35 3a)
fallen在此处作形容词，意为___________________，仅用于名词前作定语。fallen leaves 意为_________。
【拓展延伸】fallen还是动词fall（落下，掉落）的过去分词形式。
如： 秋天是一个有新鲜空气和落叶的美丽季节
Autumn is a beautiful seasn with fresh air and ____________.
Several f the bks __________ nt the flr.
fallen leaves
have fallen
When the schl basketball cmpetitin started, Kate was still making her way t schl. (教材P37 1d)
make ne’s way意为____________________，常与介词__________连用，表示方向，后接表示____________。
如：我们穿过人群慢慢地向购物中心走去。
We slwly ________________ the mall thrugh the crwd.
made ur way t
【拓展】有关way的短语： by the wayin a way lse ne's way in the/ne’s way n the wayn ne's way t
I left my phne at hme./I left my huse late (教材P37 1b听力)
leave及物动词，意为_______，强调的是“从原来的地方离开”，leave后可以直接接地点名词作宾语。“leave+地点”表示___________。
leave用作不及物动词时，常与介词fr连用，“leave fr+地点”表示__________, 只表示方向，而不涉及到达与否。
“leave+地点+fr+地点”表示__________________。
“leave sth +地点”指的是_____________________，切记不能用________。
你什么时候离开上海的？
When did yu ______________?
下周五。爱丽丝要去伦敦了。
Next Friday. Alice is ___________ Lndn.
你为什么要离开上海去北京？
Why are yu _________________________?
她昨天把书忘在家里了。
She ___________________ yesterday.
leave Shanghai
left her bk at hme
leaving Shanghai fr Beijing
Mre recently, mst Americans remember what ... by terrrists. (教材P38 2b)
recently作副词，意为______________；可用于一般过去时（表示时间点）或现在完成时（表示一段时间）中。
【拓展】recent作形容词，意为_________，修饰名词。
如：我们最近收到了他的一封信。
We received a letter frm him _________.
I have been very tired _________.
近年来，我们的生活方式发生了很大变化。
Our way f life has changed a great deal in ______ years.
Kate didn't think her friend was telling the truth abut the event. (教材P39 2c)
truth在此处作不可数名词，意为____________；是________的名词形式。true adj.符合事实的; truly adv.真正；确实。t tell the truth__________。
That cannt _______________.
说实话，我不想去参加聚会。
_________________, I dn't want t g t the party.
的确，年轻人非常喜欢这种新型的共享自行车。你应该相信真相。
It is ______ that yung peple ________ lve this new kind f shared bikes. Yu shuld _______________.
hide the truth
T tell the truth
believe the truth
I was s scared that I culd hardly think clearly after that. (教材P38 2b)
It rained _________ yesterday.
The prblem is ________.
汤姆学习努力并且取得了好成绩。
Tm ____________ and gets gd grades.
冰箱里几乎没有食物了。
There is _______ any fd in the fridge.
试卷中有些很难的问题。
There were sme very _____________ n the exam paper.
hard questins
My parents did nt talk after that, and we finished the rest f ur dinner in silence.(教材P38 2b)
the rest f … 意为______________
in silence 意为___________
有人想要这剩余的比萨饼吗？
Des anyne want ___________________?
汤姆来自英国，我们其余的人来自中国。
Tm is frm England and _______________ are frm China.
这四个人一声不吭地坐着。
The fur men sat ____________.
She is eating dinner ___________.
the rest f this pizza
the rest f us
Mre recently, mst Americans remember what they were ding when the Wrld Trade Center in New Yrk was taken dwn by terrrists.(教材P38 2b)
take dwn意为_____________。take dwn还可意为______________。与_____________同义短语。
你能帮我拆除这顶帐篷吗？
Culd yu please help me ___________________?
我忘了记下他的电话号码了。
I frgt t _____________________________.
take dwn this tent
take dwn his telephne number
I had truble thinking clearly after that because I was very afraid. (教材P38 2d)
have truble (in) ding sth.为固定短语，意为______________________；_________________________”。同义短语___________________________/ _________________________________/______________________________/ _________________________。
have difficulty (in) ding sth.
have a hard time (in) ding sth.
have prblems (in) ding sth.
have prblems with sth.
成千上万的人都有难以入睡的困扰。
Thusands f peple _________________________.
他毫不费劲地找到了一份工作。
He _________________________.
have truble falling asleep
had n truble finding a jb
But when I pinted it ut t my friend, it went away. (教材P40 1)
pint ut 意为_______，是____________型短语，人称代词作宾语时应放在________________。
【拓展】pint t意为_______，所指的物体______，pint at意为_________，所指的物体_______。
这个句子中有一处错误，你能把它指出来吗？
There is a mistake in this sentence. Can yu ____________?
老师指出了我作业中的许多错误。
The teacher ________________________ in my hmewrk.
pinted ut many mistakes
Review the Grammar
过去进行时（Past Prgressive Tense）
过去进行时表示在过去某一时刻或某一段时间正在进行的动作, 其基本结构为__________________。
过去进行时的基本句式
The girl ___________ when I saw her.
主语 + was/were + v-ing+其他.
主语 + was/were + nt + v-ing+其他.
I _________________ at nine ’clck last night.
“was/were+动词-ing”
如：我看到那个女孩时，她正在购物。
was shpping
wasn’t watching TV
如：昨晚九点我没有看电视。
—_________________ at that time? —Yes, I _______. / N, I _______.
Was/Were + 主语 + v-ing + 其他?
特殊疑问词 + was/were + 主语 + v-ing + 其他?
—______________________ yesterday?—We ______________ at ten last night.
肯定回答：Yes, 主语+was/were.
否定回答：N, 主语+wasn't/weren't.
如：—那时你在做饭吗？ —是的，我是。/不，我没有。
Were yu cking
如：—你昨天什么时候跳舞的？ —昨晚十点我们在跳舞。
When were yu dancing
were dancing
过去进行时的基本用法
We _________________ all day yesterday.
表示过去某一段时间内_________的动作，常与___________, ____________等时间状语连用。有时没有明显的时间状语，可根据__________判断。
Miss Li ____________ at this time yesterday.
表示过去某一时刻_______________的动作，与表示过去某一时间点的时间状语连用，如_____________________________, _____________________等。
the whle day
all day yesterday
如：昨天我们上了一整天的课。
were having classes
at 3 ’clck yesterday afternn
at this time yesterday
如：李小姐昨天这个时候正在购物。
昨晚8:00_______________________________________ 昨天这个时候_______________________________________ 正在那个时候_______________________________________ 昨晚6:00 到9:00_______________________________________ 昨天晚上_______________________________________ 昨天当你到这儿时_______________________________________ 刚才当我看见他们时_______________________________________ 当你遇到他们时_______________________________________ 我们外出时_______________________________________ 昨天妈妈在做饭时_______________________________________ 当你在和Jhn说话时_______________________________________
at 8:00 last night
this time yesterday
at that time /at that mment
frm 6:00 t 9:00 last night
yesterday evening
when yu gt here yesterday
when I saw them just nw
when yu met them
while we were ut
while my mther was cking
while yu were talking with Jhn
现在分词变化形式（+ing）
take ________ play ________ shp ________sleep ________ buy ________leave ________ turn ________kid ________hit ________die ________lie ________write________
Please write the -ing frm f the fllwing wrds.
过去进行时与其他时态的区别
过去某一时刻或某一时间
主语+am/is/are+v-ing
主语+was/were+v-ing
nw(或引起注意的lk/ listen等动词）
yesterday, last night, tw years ag
at eight last night, at the time f the rainstrm, when the rainstrm came, while he was sleeping
when和while引导的时间状语从句
when引导的时间状语从句，表示主句动作发生的特定时间，既可指_________，也可指________。从句的谓语动词可以是__________，也可以是____________；从句的动作和主句的动作既可_________，也可以是___________。
when和while都可意为____________，用来引导时间状语从句。
如：当他还是个孩子的时候，他总是尝试新的想法。
____________________, he always tried ut new ideas.
It was snwing __________________ the statin.
他到达车站时正在下雪。
When he was a child
when he arrived at
____________ the airprt, the guests had left.
when引导的时间状语从句，从句可位于主句____________，当位于主句之前时，与主句要用______分开。
when引导的时间状语从句，当主句为__________________意义时，从句要用___________表示将来。
The by will be a writer ______ he ______ up.
如：当我到达机场时，客人们已经离开了。
如：这个男孩长大后将成为一名作家。
When I gt t
while引导的时间状语从句强调主句动作在从句动作进行的过程中发生，或者_________。从句的谓语动词必须为________，常用_______。
如：琳达睡觉时，珍妮在帮我做作业。
我在读故事时，那个男孩睡着了。
The by fell asleep __________________ the stry.
_____________________, Jenny ____________ me with my hmewrk.
While Linda was sleeping
was helping
while I was reading
Review the Difficulty
(　　)1.Alice ________ fr the bus at seven yesterday evening. A．waited B．was waiting C．is waiting D．waits(　　)2.On my way t schl, I saw a wallet, s I ________. A．picked it up B．put it n C．gave it ut D．tk it ff
(　　)3.Tim calls his mther every week even while he ________ arund the wrld. A．was traveling B．is traveling C．traveled D．travels
(　　)4.—Listen! It's raining ________ utside. —Ww, lk! The yard is full f rainwater nw! A．strngly B．hardly C．greatly D．heavily
【解析】表示“雨下得大”要用heavily来修饰rain，故答案为D。
(　　)5.Smene kncked at the dr ________ I was ding my hmewrk in my bedrm. I pened the dr and fund a pstman at the dr. A．while B．if C．althugh D．because (　　)6.David is a tennis player. He ________ t play tennis when he was six years ld. A．begins B．will begin C．began D．has begun
(　　)7.The by's bedrm was ________ a mess. S he cleaned it up. A. fr B. at C. in D. n
(　　)7.—Did yu see a wman in red pass by just nw? —N, madam. I ________ an interesting bk. A．read B．reading C．am reading D．was reading
【解析】考查过去进行时的用法。答语句意；没有，女士。(刚才)我在读一本有趣的书。表示动作在过去某个时候正在进行用过去进行时。故选D。
(　　)9.At first, there was t much nise. Later n, everything became quiet when the wind ________. A．turned dwn B．died dwn C．put dwn D．threw dwn
【解析】根据本题语境可知，一开始噪声很大，后来，当风逐渐减弱的时候，一切变得安静了，故died dwn符合题意。
(　　)10.—What d yu knw abut the ftball game yesterday? —Class Three ________ Class Tw and ________ the final match. A．wn; beat B．beat; beat C．beat; wn D．wn; wn(　　)11.My mther called me _______ I was sleeping in my bedrm. A. while B. since C. until D. as sn as
(　　)12.________， he didn't agree, but later he did. A．At nce B．At least C．At last D．At first(　　)13.They were s friendly that it made us ________ ne family. A．lk after B．wuld like C．feel like D．take after
(　　)14.Mr. Black walked arund and ffered help ________ we were ding an experiment. A．while B．althugh C．until D．unless
(　　)15.Because it might encurage teenagers t try smking, Sina Weib ________ the “smking” emji. A．cut up B．tk dwn C．gave away D．fund ut
(　　)16.Sme bys are playing basketball n the playgrund, and the rest ________ ding hmewrk in the classrm. A．is B．are C．was D．were
【解析】此处的“the rest”指的是“余下的男孩”，由题意可知不止一个，由前句中的“are playing”可知，应用现在进行时，故选B。
(　　)17.________ he had failed many times, he didn't give up and succeeded in the end. A．Unless B．Althugh C．If D．Because(　　)18.I'm very upset because I have truble ________ physics. A．study B．studying C．studied D．t study
【解析】have truble ding sth.意为“做某事有困难”。