9. We didn't know what made him change his mind so        (突然地) .

8. The        (辨认) of the crash victims was a long and difficult task.

7. Your return ticket is        (有效的) for three months.

6. This vase is very valuable and fragile,you must handle it with extreme       (谨慎) .

10. In this resort,you can enjoy all the comfort and        (便利) of modern tourism.

2. Many talented college graduates are        (申请) civil service posts though they aren't well paid.

3. Everyone had better not        anybody        (给.. 打电话) if he or she is driving.

4. We'd better        (着手) doing this work right now so as to get it completed on time.

根据中文提示用短语的适当形式填空

1. Nobody will be easily successful until they        (经历) many hardships.

书面表达

假设你是李平，你的美国笔友Jack问了你一个有趣的问题：如果你可以拥有一个你的克隆体，期限为一天，你会让它做什么？请根据自己的实际情况，发挥想象，给他回一封邮件。注意：1. 词数100左右；

2. 可以适当增加细节，以使行文连贯；

3. 开头和结尾已给出，不计人总词数。

Dear Jack,You asked me a very interesting question. If I could have a clone of myself for one day,I would have it do the following for me.                                                                                                            

That's my answer to the question. What about you?

                                                Yours,

                                                Li Ping