74.“Where is it?” “Where is _____? I don't know what do you mean?”

　A. what　　 B.　　 that　　 C. where　　 D. so

　此题应选A。许多同学认为“疑问词”只能出现在句首位置，对于选A认为不可理解。其实在某些特殊语境中，疑问词出现在句中甚至句末却是完全可能的,但这多半是因为有特殊的语境或使用的句式比较特殊。上面一题选what的原因是：上句问Where is it?(它在什么地),但听话人对此句中代词it指代什么东西并不清楚,所以他反问：Where is what?(什么在什么地方?)其实，这类用法在口语中经常使用。如：

　Who said what to whom?谁对谁说了什么？

　“Who took it?” “Who took what?”“谁把它拿走了?”“谁把什么拿走了?”

　It was so dark I couldn't tell who was who.当时一片漆黑，我分不清哪个是哪个。

　“We are ready. Let's begin.” “Ready for what?”“我们准备好了，开始吧。”“准备干什么?”

　“What are you going to do next fall?” “Next what?”“下一个秋季你打算要干什么?”“你说下一个什么?”

　They look exactly the same, and I really don't know which is which.它们看起来一模一样,我实在分不清哪个是哪个。

73.An awful accident, however, _____occur the other day.

　A. does　　 B. did　 C. has to　　 D. had to　

　此题正确答案应选B，句末的the other day意为“前几天”，所以句子应用过去时态，而选项D填进去不合题意，故选B。此句有两个难点：一是句中插有however一词，分散了同学们的注意力；二是所填选项B为许多同学所不熟悉的强调用法。

　(1) Your mother, however, ____ say that to us that day.　

　A. does　 B. did　　 C. is doing　　 D. was doing　

　(2) Our math teacher, however, _____ speak English well.　

　A. doing　 B. does　　 C. is doing　　 D. was doing

　以上两题答案均选B，其中的does, did均为强调用法。

72.“I haven't heard from Henry for a long time.” “What do you suppose_____ to him?”

　A. was happening　　 B. to happen C. has happened　　 D. had happened　

　此题容易误选B，认为动词suppose后接动词用不定式。正确答案应是C，其中的do you suppose是插入成分。　

请看以下类例情形(答案均选D)：　

　(1) Who do you think _____the money?　

　A. to steal　　 B. stealing　　 C. to have stolen　　 D. stole　

　(2) What do you suppose _____ him think so?　

　A. to make　　 B. making　　 C. to have made　　 D. made　

　(3) Who do you guess _____ to the station to meet her?　

　A. to go　　 B. going　　 C. to have gone　　 D. went　

　(4) What do you imagine _____ him from going?　

　A. to prevent　 B. preventing　 C. to have prevented　 D. prevented

以下各例中的do you think (believe, guess, etc)也是插入成分，但其后接的句子用陈述句语序：Who do you think he will marry?你认为他会同谁结婚？What do you think we should give her?你认为我们该给她点什么呢？When do you believe he will come?你认为他会什么时候来？What do you guess he wants to buy?你猜他想买什么呢？

71.“Each of the students, working hard at his or her lessons,___to go to university.”　 “So do I.”

　A. hope　 B. hopes　 C. hoping　 D. hoped　

　此题应选B，句子的真正主语是each of the students，横线处填的hopes是句子谓语，其中的working hard at his or her lessons是插入句中修饰主语的非限制性定语。

　(1) Each of the students, hoping to pass the exam, _____the book.　

　A. buying　　 B. having bought　　 C. should buy　　 D. to buy

答案选C，each of the students是句子主语，横线处为句子谓语，hoping to pass the exam是修饰句子主语的非限制性定语。

　(2) Many countries, for example, Mexico and Japan, _____a lot of earthquakes.　

　A. have　　 B. having　　 C. to have　　 D. having had

答案选A，many countries是句子主语，横线处为句子谓语。

70.He told me the news_____, believe it or not, he had earned $1 000 in a single day.

　A. that　　 B. which　　 C. as 　　　D. because　

　此题容易误选B，误认为这是非限制性定语从句。其实此题应选A，that引导的是一个用以修饰名词the news的同位语从句。不少同学之所以误选B，正是believe it or not(信不信由你)这个插入成分惹的祸。

69.In that month, he earned as much as, if ____ than, $40 000.

　A. no more　　 B. not more C. no much　　 D. not much　

　此题最佳答案应是B。if not more than实际为if he didn't earn more than $40 000之省略。请看类似试题(答案均选B)：　

　(1) Her pronunciation is as good as, if ____than, her teacher's.　

　A. no better　　 B. not better　　 C. no good　　 D. not good　

　(2) This church is as old as, if _____ than, that one.　

　A. no older　　 B. not older　 C. no old　　 D. not old　

　(3) He has read the book as many as, if _____ than, five times.　

　A. no more　　 B. not more　　 C. no much　　 D. not much

68. The research is so designed that once _____ nothing can be done to change it.　

　A. begins　 B. having begun　 C. beginning　 D. begun

答案选D，可视为once it is begun之省略。

80.　A. do　　 B. does　　 C. done　　 D. doing

答案选C，可视为if it is carefully done之省略。

79.67.If _____ carefully, the experiment will be successful.　

78.