11. ___ many people prefer coffee, he drinks tea as usual.

　　A. While

　　B. Besides of

　　C. Because of

　　D. Except

　　【答案】A 由句意：即使很多人喜欢咖啡，他还是照旧喝茶。此句前后是一个对比关系。While能够表示对比关系，而其它项不可。because of ：因为。Besides：除了……(还有)。except：除了。

　　12. No sooner ____ got to the station than it began to rain heavily.

　　A. had I

　　B. have I

　　C. I had

　　D. I have

　　【答案】A 本句考察no sooner…than…句型。no sooner 引导的句子要部分倒装;而no sooner后接的事件比than后的事件要更早发生，属于过去的过去，所以用过去完成时。综上，选A

　　13._____their country has plenty of oil, ours has none.

　　A. While

　　B. Where

　　C. When

　　D. Unless

　　【答案】A。考状语的连接词。While表示对比，事情同时发生选择A。在他们国家有很多石油的同时，我们国家没有太多的石油。

　　14. Young ___ he is, he knows what is the right thing to do.

　　A. that

　　B. as

　　C. although

　　D. however

　　【答案】B。as引导的让步状语从句要倒装。能够有以下几种情况：adj+as+主语+系动词be：Young as he is, he knows a lot of things.虽然他年龄不大，可知道的事情很多。n(不带冠词)+as+主语+系动词be：King as he is, he is unhappy.虽然他是个国王，不过他并不快乐。adv+as+主语+动词：Much as I like it, I won’t buy it虽然我很喜欢它，但是我还是不买它。V+as+主语+助动词：Try as she does, she will never pass it.无论她怎样努力，她也不会通过的。

　　15. ___ you return those books to the library immediately you will have to pay a fine.

　　A. Until

　　B. Unless

　　C. If

　　D. Provided

　　【答案】B 根据句意判断应该选B(unless：除非)，意即“如果不……就会……”。provided：倘若……，只要。A、C和D都和句意相反。pay a fine：交罚款。

　　16. _____ for a long time, but he tried his best to catch up with his classmates.

　　A. Having been ill

　　B. Being ill

　　C. Though he was ill

　　D. He was ill

　　【答案】D。本题考查的是连词的应用。因为but后面连接的是完整的句子，所以but前面也要连接整个句子。排除A、B。而英文中“though”和“but”不能连在一起使用，所以不选C。所以此题选择D。

　　17. The old gentleman never fails to help ___ is in need of his help.

　　A. whom

　　B. who

　　C. whoever

　　D. whomever

　　【答案】C 本句考查关系代词引导的宾语从句的用法。whoever引导的宾语从句，whoever在从句中做主语。本句的意思是：“这位老年人总是乐于协助每一个需要协助的人。”A、D不能担任句子主语，所以C最符合题意。

　　18. ______ at Harvard, he began to write his essay.

　　A. Busy was as he

　　B. Busy as was he

　　C. Busy as he was

　　D. As was he busy

　　【答案】C 本句考查让步状语从句的用法。as引导让步状语从句时，句子部分倒装。如：Young as he is，he knows a lot of things.虽然他年龄不大，可知道的事情很多。本句意思是：“虽然他在哈佛大学很忙，但他又开始写作了。”

　　19. _____ the price is, they are prepared to pay.

　　A. However

　　B. whichever

　　C. whatever

　　D. wherever

　　【答案】C。考察让步状语从句及其引导词。However 表示“无论如何”，whichever 表示“无论哪一个”，wherever 表示“无论在哪里”。所以选择C。

　　20. ____ I admit that there are problems, I don’t agree that they cannot be solved.

　　A. When

　　B. As

　　C. While

　　D. Since

　　【答案】C while 在这里为“即使”。句意为：即使我承认有问题，但我不同意这些问题不能被解决。