California, a state in the western United States, borders the Pacific Ocean. The third largest state in the Union, California covers an area of great physical diversity in which uplands dominate the landscape. The mountains, hills, ridges, and peaks of California border the coastline, rise to nearly 4,600 meters in the towering Sierra Nevada, encircle the great fertile basin of the Central Valley, and separate the desert into innumerable basins.
1.Bob and Jack weren't interested in traveling, so they elected to stay at home.
2.Despite the fact that she was tired after work, she prepared dinner for the whole family.
3.Immigration(移民) in the 1980s was very common.
4.Only a few of shopkeepers thought highly of the plan. The majority(大多数) were against it.
5.There is often no clear distinction(区别) between them
1.Every possible means has been tried（try），and we find only by this means is it possible to persuade him.
解析：考查主谓一致和介词。 句意：每个可能的方法被尝试，我们发现只有用这种方法我们才能说服他。 every修饰means，故means这里是单数；by this means用这种方法，固定搭配。
2.The operation turned out to be very successful, and the old man lived on for another ten years.