11. ___ many people prefer coffee, he drinks tea as usual. (QE99-56)

        A. While    B. Besides of   C. Because of    D. Except

        【答案】A  由句意：尽管很多人喜欢咖啡，他还是照旧喝茶。此句前后是一个对比关系。While可以表示对比关系，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. （QE92-46）

        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. (QE0811-44)

        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. (QE00-44)

        A. that    B. as    C. although    D. however

        【答案】B。as引导的让步状语从句要倒装。可以有以下几种情况：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，可是他并不快乐。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. (QE98-60)

        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.(QE0904-42)

        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。因此此题选择D。

        17. The old gentleman never fails to help ___ is in need of his help. (QE03-11-32)

        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帮助每一个需要帮助的人。”A、D不能担任句子主语，因此C最符合题意。

        18. ______ at Harvard, he began to write his essay. (QE04-11-44)

        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. (QE07-11-25)

        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. (QE03-04-49)

        A. When   B. As    C. While   D. Since

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