1. They lost their way in the forest, and _______ made matters worse was that night began to fall.
A. it B. which C. that D. what
2. Patience is a kind of quality ― and that is ______ it takes to do anything well.
A. what B. which C. which D. how
3. It has come to my notice _______ some of you have missed classes.
A. what B. which C. that D. when
4. _______ she was invited to the ball made her very happy.
A. What B. That C. When D. Because
5. Eat ______ cake you like and leave the others for ______ comes in late.
A. any, who B. every, whoever C. whichever, whoever D. either, whoever
6. ____ has helped to save the drowning girl is worth praising.
A. Who B. The one C. Anyone D. Whoever
7. He said he would never forget the day _______ he spent with his girlfriend in the country.
A. that B. when C. how D. where
8. She may have missed the train, in _______ case she won’t arrive for another hour.
A. whose B. that C. which D. what
9. If you want a double room, _____ will cost another ￡15.
A. as B. which C. what D. that
10. She found her wallet ______ she lost it.
A. where B. when C. in which D. that
11. _____ comes to see me, tell him I’m out.(www.yygrammar.com)
A. Anyone B. Who C. Whoever D. Everyone
12. It was the boy _____ had been in prison _____ stole the money.
A. who, where B. that, how C. who, that D. that, which
13. Is this the reason ______ at the meeting for his carelessness in his work?
A. he explained B. what he explained
C. how he explained D. why he explained
14. When he was working there he caught a serious illness from ______ efforts he still suffers.
A. which B. that C. whose D. what
15. The old building, behind ______ was a famous church, was ______ we used to work.
A. that, the place B. it, the place C. which, where D. what, where
16. You should put on the notices ______ all the people may see them.
A. where B. in which C. at D. for them
17. _____ she goes, there are crowds of people waiting to see her.
A. Wherever B. However C. Whichever D. Whoever
18. ____ you’ve got a chance, you might as well make full use of it.
A. Now that B. After C. Although D. As soon as
19. I thought she was the very girl that I should marry _______ I met her.
A. first time B. for the first time C. the first time D. by the first time
20. Don’t play by the river _______ you fall in and drown!
A. in case B. so that C. in order that D. when
【答案及解析】
1. 选D。what made matters worse 是主语从句(注意其后有谓语动词was)，相当于 the thing that made matters worse。
2. 选A。what 引导的是表语从句，相当于 the thing that it takes to do anything well。
3. 选C。that 引导的是一个主语从句，句首的it为形式主语。
4. 选 B。that 在此引导主语从句，无词义，也不充当句子成分。注意不要根据中文意思选 D，因为 because 不用于引导主语从句。
5. 选 C。两个空格处均为引导宾语从句的引导词，而四个选项中两者均可引导宾语从句的只有 C。
6. 选 D。由 is worth praising 这一谓语可知前面是主语从句，排除不能引导从句的 B 项和 C 项；whoever 引导主语从句表示“任何……的人”，在此它相当于 anyone who。
7. 选A。由于从句中的 spent 缺宾语，故应用关系代词(that)，而不能用关系副词。
8. 选C。in which case 在此相当于 and in that case。
9. 容易误选 A或B，想当然地根据空格前的逗号认为这是非限制性定语从句。其实此题应选D，逗号前是一个条件状语从句，逗号后是该状语从句的主句，that 在此代表前文所述的意思，用作主句的主语。
10. 选A。where 意为“在……的地方”，引导地点状语从句，不是定语从句。
11. 此题很容易按汉语意思误选A，其实应选C。whoever 引导的是让步状语从句，相当于 no matter who。
12. 选C。全句为强调句，被强调成分是 the boy (以及修饰它的定语从句who had been in prison)。
13. 选 A。注意不能选 D，因为动词 explained 缺宾语。
14. 选C。from whose efforts he still suffers 为修饰 a serious illness 的定语从句，whose 在定语从句中用作定语，修饰 efforts。
15. 选C。第一空填 which，指 the old building；第二空填 where，用以引导表语从句。
16. 选A。where 指“在……的地方”，用以引导地点状语从句。
17. 选A。wherever 意为“无论什么地方”。
18. 选 A。now that 为连词，用以引导原因状语从句，其意为“既然”，与since 同义。其中的 might as well意为“不妨”。全句意为“既然你得到一个机会，你不妨充分利用它”。
19. 选C。the first time 在此用作连词，用以引导状语从句。句意为“我第一次见到她就认为她很诚实”。
20. 选C。in case 意为“以防”。