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3. He kept looking at her, wondering whether he ______her somewhere.

A. saw                      B. has seen                C. sees                      D. had seen

分析：D。因為由語境可知，see應(yīng)當(dāng)發(fā)生在kept looking之前，即過去的過去，所以用過去完成時，只有D正確。又如：

When I had opened the windows I sat down and had a cup of tea. 我打開窗戶后，就坐下來喝了一杯茶。

When I had written my letters I did some gardening. 我寫完信之后，就在花園里干了點活兒。

When he had shut the window we opened the door of the cage. 他關(guān)了窗戶之后，我們把籠門打開了。

4. She ______her hairstyle in her hometown before she came to Chongqing for a better job.

A. would change        B. has changed          C. changed                D. was changing

分析：C。由came可知，她已來重慶了，而改變發(fā)型是在來重慶之前，即過去的過去，按理要用過去完成時，但before已經(jīng)表明緊接著發(fā)生的先后兩個動作，所以也可用一般過去時，所以選C。

5. He ______more than 5000 English words when he entered the university at the age of 15.

A. has learned           B. would have learned C. learned                D. had learned

分析：D。因為上大學(xué)是過去，學(xué)了5千個英語單詞是在上大學(xué)之前，即“過去的過去”，所以用過去完成時。

6. Father ______for London on business upon my arrival, so I didn’t see him.

A. has left                 B. left                       C. was leaving           D. had left

分析：D。由“我沒見到他”可知，“在我到達”前“父親已經(jīng)去倫敦”了，即父親去倫敦發(fā)生在“過去的過去”，用過去完成時。

7. The policeman’s attention was suddenly caught by a small box which ______ placed under the Minister’s car.

A. has been               B. was being             C. had been               D. would be

分析：C。因為這個小盒子“被放在部長車下”發(fā)生在“引起警察注意”之前，即“過去的過去”，所以用過去完成時。

8. Susan decided not to work on the program at home because she didn’t want her parents to know what she ______.

A. has done               B. had done               C. was doing             D. is doing

分析：C。因decided和didn’t want都是過去式，排除選項A和D; 因“做”發(fā)生在“決定”之后，而不是之前，不能用過去完成時，排除選項B。

9. —Hurry up! Alice and Sue are waiting for you at the school gate.

—Oh ! I thought they ______ without me.

A. went                    B. are going              C. have gone             D. had gone

分析：D。因為thought(原以為)是過去，他們“走了”就是“過去的過去”，所以用過去完成時。

10. They ______ on the program for almost one week before I joined them, and now we ______ it as no good results have come out so far.

A. had been working; are still working        B. had worked; were still working

C. have been working; have worked            D. have worked; are still working

分析：A。在I joined them之前，就是“過去的過去”，要用過去完成時或過去完成進行時，排除選項C和D; 由now和“到目前還沒有結(jié)果”可知，現(xiàn)在仍在進行這項工作，用現(xiàn)在進行時，排除選項B。

11. The coffee is wonderful! It doesn’t taste like anything I ______ before.

A. was having           B. have                     C. have ever had        D. had ever had

分析：C。與before連用，用現(xiàn)在完成時。再說，此處沒有一個過去時間或動作作比較，是不能用過去完成時的。

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