3. I don’t remember how ______ to stop smoking. 　 A. many times he tried　　　　 B. many times did he try 　 C. much time he tried　　　　 D. much time did he try

2. In winter many old people die ______ air. 　A. from polluting　　 　B. from polluted　 　C. of polluted　　 　　D. of polluting

1. Don’t ______ the children to start smoking. 　A. hope　　 B. encourage　 C. suggest　　 D. let

7. Not the director but the actors _____ what they can ______ money for the disabled. 　A. want to do; collect B. wants to do; collect　 　C. want to do; to collect　 D. wants to do; to collect 　分析：此题考查的是由not ...but...并列的短语作主语时，主谓一致的问题以及不定式作状语的功能。此句的谓语动词由but后面的actor决定，所以是复数形式。故删去B和D。第二空是do what they can to do sth. 这一结构的运用，其中can后省去do, 而不定式作目的状语。故正确答案为：C。

6. Shanghai is larger than _________ city in Africa. 　A. other　 B. any other　　 C. the other　　 D. any 　分析：本题考查形容词比较级的用法。此题的难度在于乍一看是考查形容词比较级形式表达最高级意义，容易误选B项。但比较级表达最高级之意时，所比较的对象应属于同一范畴，比较的范围要一致。此题比较的是中国的上海和非洲的城市，范围不同，故不能用any other。正确答案为D。

5. The murderer was brought in with his hands _________ behind his back. 　A. being tied　 B. having tied　 C. to be tied　 D. tied 　分析：本题考查分词作伴随状语。介词with后可接名词或代词再加分词，在句中充当伴随状语或定语。这时名词或代词与分词之间具有逻辑上的主谓关系；当为主动关系时用现在分词，当为被动关系时用过去分词。此题中的hands与tie明显是被动关系，故正确答案为D。

4. -What made you so angry? 　-_____. My girl friend promised to come at 7:00 , but she hasn't turned up yet. 　A. Having kept waiting　 B. Being kept waiting 　C. To be keeping waiting D. Being kept waited 　分析：此题考查的动名词作主语的这一语法功能。使you生气的是女友让你一直在等候，而且回答部分作第一句中的主语，应用动名词或不定式来完成，所以应是 "keep sb. doing"被动语态的-ing形式。故此题正确答案为：B。

3. In the study, I found my son ______ at a desk, with his attention ______ on a book. 　A. sitting; fixing B. sit; fixed C. sitting; to be fixed D. seated; fixed 　分析：此题考查不定式与分词作宾补的区别以及短语fix one's attention的用法。因为强调found的动作与sit同时进行，而省去to的不定式sit作宾补表动作的完成，但sitting和seated皆可。第二空中，attention原为fix的逻辑宾语，所以应选fixed作宾补足语。故此题正确答案为：D。

2. I didn't hear the phone last night. I _____ asleep. 　A. must be B. should have been C. must have been D. should be 　分析：此题中“must + have + p.p”表示对过去的推断，虽未证实，但十分有把握，意为“一定”、“准是”；“should + have + p. p”表示过去该做而实际未做的事，含有后悔或责备的意味。根据前句语境，可能判断出C是正确的。

1.John was so sleepy that he could hardly keep his eyes _________. 　A. open　 B. to be opened　 C. to open　 D. opening 　分析：本题考查"keep+宾语+宾补"结构。此时宾补常为形容词、副词、介词短语、分词等，据此可排除B、C项。根据题意"约翰困得眼睛都快睁不开了。"可知是"保持一种状态"，应用形容词作宾补；而不是持续发生的动作，不用现在分词。故答案为A。