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16. —Don’t put the waste on the ground.

—Oh, I’m very sorry. I _____the dustbin there.

A. don’t see                      B. isn’t seeing

C. didn’t see                     D. haven’t see

17. —How is the weather in your country this summer?

—It _____as much as it does now for a long time.

A. hasn’t rained                 B. doesn’t rain

C. wasn’t raining               D. didn’t rain

18. —Does Liu Hui serve in the army?

—No, but he _____in the army for three years.

A. served                          B. has served

C. is serving                      D. would serve

19. —Sorry. I _____to post the letter for you.

—Never mind. _____it myself after school.

A. forget; I’d rather post     B. forgot; I’ll post

C. forgot; I’m going to post D. forget; I’d better post

20. Unfortunately, when I dropped in, Professor Smith _____, so we only had time for a few words.

A. has just left                    B. had just left

C. just left                          D. was just leaving

21. —What were you doing when I phoned you last night?

—I _____my painting and was starting to take a bath.

A. have already finished       B. was finishing

C. had just finished              D. was going to finish

22. You _____television. Why not do something more active?

A. always watch                  B. are always watching

C. have always watched       D. have always been  watching

23. I have been studying computer for several years and I still _____.

A. have          B. do             C. have been        D. am

24. Jane was disappointed that most of the guests________ when she ________at the party.

A. left; had arrived               B. left; arrived

C. had left; had arrived         D. had left; arrived

25. The pen I ________ I ________ is on my desk, right under my nose.

A. think; lost                       B. thought; had lost

C. think; had lost                 D. thought; have lost

●模擬解析●

1. C。第一空填 look, 因?yàn)檫@是祈使句的謂語；第二空填 had，因?yàn)榍耙痪湔f“看看時間吧”，這一看當(dāng)然知道了現(xiàn)在很遲的情形，“不知道這么遲了”顯然應(yīng)是“過去”的事，故應(yīng)用一般過去時態(tài)。

2. A。從語境上看，“忘記”的時間應(yīng)是現(xiàn)在，即指現(xiàn)在不記得了。

3. B。其中的 did 為強(qiáng)調(diào)用法。

4. B。從語境上看，develop 不僅要用被動語態(tài)，而且要用進(jìn)行時態(tài)。

5. A。從下文的語境看，既然現(xiàn)在叫對方重復(fù)一遍，說明“沒聽清對方的最后一點(diǎn)”應(yīng)發(fā)生在過去（即說此話之前）。

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