英语四年级上册Unit 5 SafetyLesson 3优秀ppt课件

Unit 5  Safety 第三课时 习题

一、根据句意及首字母提示补全单词完成句子。

1. Please use the s_____ . It’s safe.

2. Don’t play with fire. It’s d_____.

3.Please w____ for the green light.

4. Don’t c____ on the window ledge.

5.Please play f____ in the playground.

二、找出与其它两项不同类的选项。

(   )1. A. red          B. green      C. tree

(   )2. A. football      B. piano      C. basketball

(   )3. A. street        B. dangerous   C. safe

(   )4. A. tree         B. flower      C. climb

(   )5. A. for          B. the         C. at

三、读句子并按要求改写。

1. Please wait for the green light. (改为否定句)

 _______________________________________.

2.The light is green. (改为一般疑问句)

________________________?

3. street  play   the  football  don’t  in (.) (连词成句)

 ____________________________.

4. It’s dangerous. (改为反义句子)

 _______________________.

5. Don’t climb on the window ledge. (改为肯定句)

 ______________________________.

四、选择题。

(   ) 1. Please play football in the _____.

  A. street      B. playground        C. classroom

(   ) 2. Don’t run ____ the stairs.

1. down      B. up                C. in

(   ) 3.The light is green. ____ go.

       A. Don’t      B. Please            C. Not

(   ) 4. Please wait _____ the green light.

A. for         B. to              C. at

(   ) 5. Don’t climb ___ the window ledge.

       A. in           B. on            C. at                

五、读短文，并根据短文内容判断句子的正T误F。

 It is in summer. A young man comes to a forest(森林). He is walking along the edge(边缘) of the forest. On his right is a river. On his left is a forest. Suddenly he sees two green eyes looking at him from the trees. A wolf is getting ready to jump on him.

 What does he do? He must jump into the river. In the river there is a crocodile(鳄鱼). Its mouth is very big. The young man closes his eyes. And he hears the wolf jumps, but nothing happens to him. Then he opens his eyes and finds the wolf is now in the mouth of the crocodile.

 (   )1. There is a river on the right of the young man.

(   )2. A young woman comes to a forest.

(   )3. There is a wolf on the right of the young man.

(   )4. In the river there is a crocodile.

(   )5. The crocodile eats the wolf.

Unit 5  Safety 第三课时 答案

一、

【解析】

1.根据句意及首字母提示可知此空填sidewalk人行道, 故填sidewalk.   

2.根据句意及首字母提示及句意可知此空填dangerous危险的，故填dangerous.

3.根据句意及首字母提示可知此空填wait, wait for等待 故填wait.

4.根据句意及首字母提示可知此空填climb爬，故填climb.

5. 根据句意及首字母提示可知此空填football足球，故填football.

【答案】1.sidewalk   2.dangerous  3.wait   4. climb  5. football

二、

【解析】

1.red, green是表示颜色的词，tree树木，故选C.

2.football, basketball都是球类，piano钢琴，故选B.

3. dangerous, safe都是形容词，street街道，名词，故选A.

4. tree, flower都是名词，climb是动词，故选C.

5. for, at 都是介词，the是定冠词，故选B.

【答案】1. C     2. B    3. A    4. C    5. B

三、

【解析】

1. 此句改为否定句时要在动词wait前加don’t, 应为Please don’t wait for the green light.故填Please don’t wait for the green light.

2. 此句改为一般疑问句时要将动词is放在句首，并且第一个字母要大写，应为Is the light green? 故填Is the light green?

3. 根据所给的词及标点可组成句子为Don’t play football in the street. 故填Don’t play football in the street.

4. 此句改为反义句子时要将dangerous改为safe. 故填It’s safe.

5. 此句改为肯定句时要将Don’t去掉，应为Climb on the window ledge. 故填Climb on the window ledge.

【答案】

1. Please don’t wait for the green light.  

2. Is the light green?    

3. Don’t play football in the street.

4. It’s safe.       

5. Climb on the window ledge.

四、

【解析】

1. play football应在playground, 而不能在street和classroom，故选B.

2. run down the stairs跑下楼梯，固定搭配，故选A.

3. 句意：绿灯亮，应为Please go请通行， 故选B。

4. wait for等待，固定搭配，故选A.

5. climb on the window ledge爬窗，固定搭配，故选B.

【答案】1.B   2. A    3.B   4. A   5. B  

五、

【解析】

1. 根据短文中On his right is a river.可知此句是正确的，故答案为T。

2．根据短文中A young man comes to a forest可知此句是错误的，故答案为F。

3.根据短文中On his left is a forest. Suddenly he sees two green eyes looking at him from the trees.可知此句是错误的，故答案为F。

4. 根据短文中In the river there is a crocodile.可知此句是正确的，故答案为T。

5.根据短文中Then he opens his eyes and finds the wolf is now in the mouth of the crocodile.可知此句是正确的，故答案为T。

【答案】1. T   2.F   3. F   4.T   5.T