● Task学案

1. Recently, though, it seems that there has been a reversal of this process across China.

(P 27)

然而，最近在中国这种情况似乎又有逆转的迹象。

Grammar point: Perfective tense

A perfective tense used to express action completed in the past; "`I had finished' is an example of the past perfect"

相关高考试题：

1.（2006江苏）

Although medical science __________ control over several dangerous diseases, what worries us is that some of them are returning.

A. achieved B. has achieved C. will achieve D. had achieve

2.（2006陕西）

The construction of the two new railway lines _______by now.

A. has been completed B. have been completed

C. has completed D. have completed

3. (2007 上海)

With the help of high technology, more and more new substances ______ in the past years.

A. discovered B. have discovered

　C. had been discovered D. have been discovered

4. (2007 北京)

I got caught in the rain and my suit____.

　A. has ruined B. had ruined C. has been ruined D. had been ruined

5. (2007 福建)

Danny hard for long to realize his dream and now he is popular.

A. works B. is working C. has worked D. worked

6. (2007 江苏)

-______ you ______ him around the museum yet?

-Yes. We had a great time there.

A. Have ... shown B. Do ... show C. Had ... shown D. Did ... show

7.(2007 上海春)

The unemployment rate in this district from 6% to 5% in the past two years.

A．has fallen B．had fallen C．is falling D．was falling

答案及解析：1. B 2. A 3. A 4. C 5. C 6. A 7. A