一、 1~5 C;B;A;A;B
6~10 C;D;A;B;C
11 ~15 C;C;B;D;A
16~20 B;B;D;D;A
二、1~5 A;C;B;C;D
6~10 A;B;C;D;A
三、1~5 A;D;A;B;B
6~10 A;D;C;D;C
11~15 A;A;B;B;D
四、1~5 D;C;A;B;E
五、1、advice
2、Instead
3、better
4、But
5、on
6、Accept
7、food
8、expected
9、wrong
10、follow
六、1~5 C;F;G;A;D
七 、One possible version:
Dear Alice,
I'm happy to know that you have a three-day vacation I think you should go to the dentist on the first day. If you have a toothache, you can't do other things'happily. On the second day, you can do your homework at home. After studying for a Iong time,you may feel tired. In my opinion, you can go to the cinema on the last day. Watching movies is a good way for you to relax. I hope you'll have a nice vacation.
Yours,
Liu Jie