20. In which play is _____ your brother appear?

　A. that where　 B. this when　 C. it that　 D. it where

选C 。It is … that是用强调句中,被强调部分是in which play。

19. It must be he that has stolen Mr. Smith’s purse, _____?

　A. hasn’t he　　　　　 B. isn’t he

　C. mustn’t it　　　　　 D. isn’t it

　选D。强调句型的反意疑问句，现在或将来用isn’t it?过去用wasn’t it?

18. Playing football and watching TV _____ both interesting.

　A. were　 B. was　　 C. are　　　　　 D. is

　选C 。不定式短语或动词短语作主语时，谓语动词应用单数，然而此题中and 连接了两个动名词短语， 因此谓语动词要用单数，故答案为C.

17. ---Is anything _____?

　---I can’t decide which dress I should wear at my friend’s wedding party.

　---I don’t think it ____.

　A. the matter; the matter　 B. matter; matters

　C. the matter; matters　　 D. matter; the matter

　选C。 当matter作表语时前应有冠词； “ don’t think it matters” 意为“我认为那不重要”。

16. Mr Smith,　　　　 of the　　　 speech, started to read a novel.

　A. tired; boring　　 B. tiring; bored

　C. tired; bored　　　 D. tiring; boring

　选A。tired of…是过去分词短语作状语，boring 是现在分词作定语。

15. The customer didn’t choose______of the coats and went away without looking at a third one.

　A. both　　　　 B. all

　C. any　　　　　 D. either

　选D。not与both, all 连用为部分否定，与any either 连用为完全否定。且两个coats 不可用all，故据题意，应用完全否定。

14. The pen I　　　 I　　　 is on my desk, right under my nose.

　A. think; lost　　　 B. thought; had lost

　C. think; had lost　　 D. thought; have lost

　选B。句意为：我以为已丢了的钢笔却在我的桌子上，就在眼皮底下。thought 是过去时，“笔丢失了”是在“thought”之前，所以用过去完成时。

13. The traveler didn’t know ______which direction to go.

　A. in　 B. at　 C. to　 D. /

　选A。表示“朝……方向去”，用介词in 而不用to。

12. In the power plant more than　　　 of the workers are out　　　　 strike.

　选A。twelve 的序数词形式为twelfth；分数表达法中的分子大于1时，分母用复数，on strike = 在罢工。

11. I don’t have a job. I would find one but I　　 no time.

　A. had　　　 B. didn’t have

　C. had had　　 D. have

　选D。解此类题时，必须从题干中的暗示入手。I don’t have a job 告诉我们现在的状况，再由I would find one 可知是对现在的虚拟，因此，but后的句子应该是现在的事实。故用一般现在时。