1. My advisor encouraged _____ a summer course to improve my writing skilling.
　　 A. for me to take B. me taking
　　 C. for me to take D. me to take
　　 2. As we know, the problem _____ at the meeting at the coming weekend is very important to us.
　　 A. discussing B. to discuss
　　 C. to be discussed D. to be discussing
　　 3. There are five pairs _____ , but I’m at a loss which to buy.
　　 A. to be chosen B. to choose from
　　 C. to choose D. for choosing
　　 4. In order to gain a bigger share in the international market, many state-run companies are striving _____ their products more competitive.
　　 A. to make B. making
　　 C. to have made D. having made
　　 5. ---Do you mind if I open the window?
　　 ---Sorry, but I feel a bit cold. You’d better _____ .
　　 A. not to open the window B. not to
　　 C. not open D. not
　　 6. Sandy could do nothing but _____ to his teacher that he was wrong.
　　 A. admit B. admitted
　　 C. admitting D. to admit
　　 7. The flu is believed _____ by viruses that like to reproduce in the cells inside human nose and throat.
　　 A. causing B. being caused
　　 C. to be caused D. to have caused
　　 8. She searched the top of the hill and stopped _____ on a big rock by the side of the path.
　　 A. to have rested B. resting
　　 C. to rest D. rest
　　 9. Having a trip abroad is certainly good for the old couple, but it remains _____ whether they will enjoy it.
　　 A. to see B. to be seen
　　 C. seeing D. seen
　　 10. ---Mum, why do you always make me eat an egg everyday?
　　 ---_____ enough protein and nutrition as you are growing up.
　　 A. Get B. Getting
　　 C. To get D. To be getting
　　 11. Though I can’t make the model ship _____ faster, the model plane can be made _____ higher by any of the boys here.
　　 A. sail; to fly B. to sail; fly
　　 C. to sail; to fly D. sail; fly
　　 12. With a lot of difficult problems _____ , the newly-elected president is having a hard time.
　　 A. settled B. settling
　　 C. to settle D. being settled
　　 13. It is better to lose one’s life than _____ .
　　 A.if you lose your spiritB. losing his spirit
　　 C. to lose one’s spirit D. your spirit getting lost
　　 14. Do let your mother know all the truth. She appears _____ everything.
　　 A. to tell B. to be told
　　 C. to be telling D. to have been told
　　 15. Last summer I took a course on _____ .
　　 A. how to make dress B. how dress to made
　　 C. how to be made dress D. how dress to be made
　　 16. Little Jim should love _____ to the theatre this evening.
　　 A. to be taken B. to take
　　 C. being taken D. taking
　　 17. I would love_____ to the party last night but I had to work extra hours to finish a report.
　　 A. to go B. having gone
　　 C. going D. to have gone
　　 18. Rather than _____ on a crowded bus, he always prefers _____ a bicycle.
　　 A. ride; ride B. riding; ride
　　 C. ride; to ride D. to ride; riding
　　 19. The news reporters hurried to the airport, only _____ the film stars had left.
　　 A. to tell B. to be told
　　 C. telling D. told
　　 20.---Tomorrow is a holiday. Why are you doing your homework?
　　 ---I’m doing this exercises now so that I won’t have _____ on Sunday.
　　 A. to do B. them C. it D. to
　　
　　 【答案解析】
　　 1. 答案 Dencourage是一个能够带不定式做宾语补足语的动词，其结构为encourage sb to do sth.
　　 2. 答案 C本题考查的是动词不定式做定语。不定式做定语表示“未做、要做”；the problem和discuss之间是被动关系。
　　 3． 答案 B从题意可知，“有五双鞋可供选择”，而不是“选五双鞋”。
　　 4． 答案 Astrive to do sth.是固定的用法。
　　 5． 答案 D由had better (not) do sth 这一结构可以看出A、B是不对的；另外不定式所表示的动作在题干中是第二次提到，所以该不定式可以省略，只保留否定副词not。
　　 6． 答案 A题干中的but意思是“除了”，此时如果它的前面有do的某种形式，则其后的动词不定式要省去to，反之要保留。 do nothing but do sth意为：“只能做某事”。
　　 7. 答案 C题干中涉及的句型为“S + be + believed to do/to be done sth”，分析题干可以知道，the flu和cause之间存在逻辑上的被动关系。全句意思是：“这种流行性感冒是由病毒引起的，这些病毒擅长在人的鼻子和喉咙的细胞里繁殖（病毒）”。
　　 8． 答案 C本题考查了stop的用法。stop doing sth“停止做某事”；stop to do sth“停下来去做某事”。
　　 9． 答案 Bremain + to do /to be done是remain 的重要用法，C应该排除；因为it指代的是上文中提到的事情，所以它和see之间存在被动关系，这样A项也是错误的；D项不合题意。
　　 10． 答案 C根据上下文的意思，答语部分是一个省略句，意思是：“为了在你身体成长时期能获得足够的蛋白质和营养成分”。只保留了目的状语。
　　 11． 答案 Amake是“使役动词”，它后面作宾语补足语的动词不定式要略去to，但当这类动词用作被动语态时，则要保留to。
　　 12． 答案 C“with + n. + to do/doing/done”中的动词分别表示“要做”、“在做”、“做了”三种意义。所以A、B、D三项时态明显错误。
　　 13． 答案 C分析题干我们可以看出，比较连词than连接了两个并列的动词不定式。
　　 14． 答案 D不定式的完成时态表示该不定式所表示的动作在主句谓语动词所表示的动作之前就已经完成；还可以从上下文看出，she和tell之间的关系是被动的。因此应是appear to have been done sth。
　　 15． 答案 A本题考查“疑问词+动词不定式”的用法。
　　 16． 答案 Ashould love to do sth 是一个固定搭配，这样可以排除C、D两项；再根据题干主语和之后动词不定式的被动关系，其结构应该是should love to be done。
　　 17． 答案 DWould love to have done的意思是：“过去愿意（打算）做而未做”。题意是：“我昨天晚上本来是想来参加晚会，但是不得不加班写一个报告”。
　　 18． 答案 Cprefer to do…rather than do…“宁愿做……而不做……”，也可以是rather than do…prefer to do
　　 19． 答案 B题意：“新闻记者匆匆赶到机场，结果被告之电影明星已经离开了。”动词不定式常用来表示一种意料之外的结果。
　　 20． 答案 D题干中答语的意思是：“我现在做练习，以便我在星期天就不用做了”。根据结构，不定式指代的是上文中出现过的动作，应该使用动词不定式的省略形式，即保留to，其他全部略去。