times in his spaceship.
A. spent, circling B. took, travelling
C. spent, to travel D. took, to circle
【解析】答案：D。该题考查的是动词的用法。本句子的结构是It took sb. some time to do sth. 只有D能用在这一结构中。
28. The students are sorry to hear that the famous singer _______ for half an hour.
A. has left B. has gone C. has been away D. has gone away
【解析】答案：C。该题考查的是延续性动词和非延续性动词的用法。因为本句中的时间状语是for half an hour，表示的是一段时间，所以应和延续性动词连用。四个选项中只有has been away能表示延续性的动作。
29. I am waiting for my friend. _________, I will go swimming alone.
A. If he doesn’t come B. If he won’t come
C. If he will come D. If he is coming
【解析】答案：A。该题考查的是在时间状语从句里的时态。在时间状语从句里，通常用一般现在是代替一般将来时。
30. ---Could you tell me _______?
---Sorry, I don’t know. I was not at the meeting.
A. what does he say at the meeting B. what did he say at the meeting
C. what he says at the meeting D. what he said at the meeting
【解析】答案：D。该题考查的是宾语从语的语序和时态。第一，宾语从句应用陈述句的语序；第二，表示“在会上所说的话”应用一般过去时。
【满分演练】
单项天空
1. Ann is so careful that she always goes over her exercises to _______________there are no mistakes.
A. look for B. make sure C. find out D. think about
2. --- Which of the two English dictionaries will you buy?
--- I'll buy _________ of them, so I can give one to my friend, Hellen.
A. either B. neither C. all D. both
3. He __________ two thousand trees since 1985.
A. plants B. planted C. will plant D. has planted
4. ___________ you free last night?
A. Were B. Was C. Are D. Do
5. --- Dad, when will you be free? You agreed to go to the seaside with me four days ago.
--- I am sorry, Jean. But I think I will have a _____________holiday soon.
A. four-days B. four-day C. four days D. four day
6. In the bookshop, a reader asked the shopkeeper ____________Who Moved My Cheese was an interesting book.
A. that B. how C. what D. if
7. ___________comes from cows.
A. Wool B. Chicken C. Pork D. Milk
8. Which of the following does paper burn in?
A. CO2 B. N2 C. O2 D. He
9. Today, the forests have almost gone. People must ___________down too many trees.
A. stop to cut B. stop from cutting
C. be stopped to cut D. be stopped from cutting
10. --- You must come back every month.
--- Yes, I __________________.
A. will B. must C. should D. can
11. The doctor did what he could _________________that child.
A. save B. to save C. saved D. saving
12. --- Can you guess if they _____________to play basketball with us?
--- I think they'll come if they _______________tree.
A. come; are B. will come; will be
C. will come; are D. come; will be
13. I will tell you how to get to the place; you'd better _____________it __________.
A. try; on B. get; off C. take; down D. pick; up
14. --- Ann has gone to Shanghai.
--- So _____________her parents.
A. do B. had C. did D. have
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