C. to send it to D. for sending it to
29. _______ on time, this medicine will be quite effective. A. Taking C. Taken
B. Being taken D. Having taken
30. The film star walked to his car, ______ a crowd of journalists. A. followed by C. to follow
B. following by D. to be followed by
31. After describing the planned improvements, she went on _______ how much they would cost. A. to explain C. to be explaining
B. explaining D. having explained
32. Please excuse me _______ your letter by mistake. A. to open C. for opening
B. to have opened D. in opening
33. Please remember _______ the plants while I’m away. A. watering C. to water
B. to be watering D. being watering
34. Certainly I posted your letter — I remember ______ it. A. posting C. to be posting
B. to post D. have posted
35. Stop _______ me to hurry up. I can only go so fast. A. to tell C. to have told
B. telling D. having told
36. Remember _______ off the light when _______ to bed. A. turning, going C. turning, to go
B. to turn, to go D. to turn, going
37. _______ time, he’ll make a first-class tennis player. A. Having given C. Giving
B. To give D. Given
38. _______ in 1636, Harvard is one of the most famous universities in the United States. A. Being founded
B. It was founded
C. Founded D. Founding
39. The lady said she would buy a gift for her daughter with the ________. A. 20 dollars remained C. remained 20 dollars
B. 20 dollars to remain D. remaining 20 dollars
40. The picture _______ on the wall is painted by my nephew. A. having hung C. hangs
B. hanging D. being hung
41. With a lot of difficult problems ________, the newly-elected president is having a hard time. A. settled C. to settle
B. setting D. being settled
42. Having a trip abroad is certainly good for the old couple, but it remains _______ whether they will enjoy it. A. to see C. seeing
B. to be seen D. seen
43. Tony was very unhappy for _______ to the party. A. having not been invited C. having not invited
B. not having invited D. not having been invited
44. “Good morning. Can I help you?” “I’d like to have this package _______.” A. be weighed C. to weigh
45. What have we said _______ her so happy? A. makes C. made
B. to make D. has made B. to be weighed D. weighed
46. What worried the child most was ______ to visit his mother in the hospital. A. his not allowing C his being not allowed
B. his not being allowed D. having not being allowed
47. “Which sweater is yours?” “The one _______ No. 9.” A. that marked C. which marked
48.If the car won’t start, _____ it.
B. was marked with D. marked with
A. try push C. to try pushing
B. try pushing D. to try to push
49. They stayed up until midnight _____ the old year out and the new year in. A. and saw C. seeing
◆答案与解析◆
1. 选D。catch sb doing sth 意为“碰上某人在做某事”或“逮住某做某事”。
2. 选B。这是一个含when 引导时间状语从句的主从复合句，having a good teacher 在主句中用作主语。
3. 选C。句中的 it 为形式主语，不定式 to be asked to speak to you 为真正主语，因“我”与ask为被动关系，故用被动式。
4. 选 B。like 和 love后接不定式或动名词均可，但 would love / like 后只能接不定式，据此可排除选项 C、D。表示过去未曾实现的愿望，其后要接不定式完成式，即选 B。 5. 选A，before 引导的是时间状语从句，填空句为主句，而此主句为一祈使句，故动词用原形。其中 it will have … 为修饰名词 the effect 的宾语从句。
6. 选 A。根据句中的 studied 可知，他曾到国外留过学，也就是说“留学”这个动作已结束并发生在谓语动作(is said)之前，故用完成式，即选 A。
7. 选 C。do with 与 what 连用可以表示“处置”、“放置”、“利用”等。如： What shall I do with it? 怎样处置它好呢?
What have you done with my umbrella? 你把我的雨伞放到哪 里去了? I don’t know what to do with this strange object. 我不知道这怪东西有什么用。
8. 选B。anyone seen carrying bags…为 anyone who was seen carrying bags 之略，其中过去分词短语 seen carrying bags … 用作定语修饰代词 anyone。另外，句中的 who was seen carrying bags 为 see sb doing sth 这一结构的被动式。
9. 选 B。devote…to… 的意思是“把……贡献给……”或“致力于……”，其中 to 是介词，不是不定式符号，若后动词要用动名词。句中的 he had 为定语从句，用以修饰 all，注意不将 had to 视为同一个语义结构。
B. to see D. for seeing
10. 选 C。lead to 意为“导致”，其中的 to 是介词，不是不定式符号，若后接动词要用动名词。由于逻辑主语 the thief 与catch 为被动关系，故答案选 C。
11. 选 D。look forward to 意为“期盼”，其中 to 是介词，后接动词要用动名词。注意不能选 B，因为 pay a visit 不能带 the flower-lined garden 作宾语，假若在 paying a visit 后加上介词 to，则可选 B。
12. 选A。句首的 to test eggs 为目的状语，填空句为祈使句谓语，故要用动词原形。 13. 选B。现在分词短语表伴随。
14. 选C。to get enough protein and nutrition 表目的。
15. 选A。(be) lost to sth 为习语，意为“不再受某事物的影响”、“将某事物置之度外”。 16. 选C。因keys 与 find 是被动关系。
17. 选 A。不定式的否定式总是将否定词 not 置于不定式符号 to 之前，而不能置于其后，同时结合 tell sb (not) to do sth 这一结构可排除选项 C、D。当不定式的动词是前面已出现过的相同的动词时，为避免重复，通常省略该不定式而只保留不定式符号 to。
18. 选 B。find 后可接现在分词（表示动作在进行）或过去分词（表被动关系）作宾语补足语，但是不接不定式。另外，由于he 与 smoke 是主动关系，故选 B。
19. 选 D。非谓语动词作状语时，其逻辑主语就是句子主语。比较四个选项，finding her car stolen 的逻辑主语显然是 she，而不是 a policeman, the area, it 等，故选 D。
20. 选 B。the key to… 意为“……的关键”，其中的 to 是介词，不是不定式符号，若后接动词要用动名词。另一方面，名词 demand 与 make 是被动关系(make demands 提出要求)，同时根据句中的 by the customers，可确定答案选 B。
21. 选 C。答句是针对疑问词 what 的回答，而问句中的疑问词 what 在句中用作主语，所以答句也应是一个能用作主语的东西，比较四个选项，只有C合适。其完整回答形式为 Losing her new bike made Mary so upset. 比较，下面一题要填不定式，因为四个选项中只有 To choose a new chairman 能回答疑问词 why：
“Why was a special meeting called?” “______ a new chairman.” A. Choose C. To choose
B. Choosing D. Chosen
22. 选 D。由于 the research 与 begin 是被动关系，故用过去分词 begun。Once begun 可视为 once it is begun 之省略。
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