答案：

一． 1-5  CCDBB    6-10 ACACB      11-15 ACBDB      16-20 ABCCD

二．21-25 AADDC      26-30 BDCDB

三．A篇  BBABC    B篇 BBCAB      C篇  DCBDA

D篇  1. She always studies hard.

      2. She took a shower and had breakfast.

      3. Scary.

      4. Her grandmother.

      5. In the evening.

四、building    umbrella    enough      choose      necessary   

unusual      plans      successful      both      grades     

五、1. The sun is much bigger than the earth.

2. Both of us are good students.

3. How often do you go hiking in spring?

4. I don’t think Lesson 10 is more interesting.

5. How many hours do you sleep every night?

六．A.  1. I’m going to be an English teacher.

        2. I’m going to stay in Xi’an.

        3. How are you going to become an English teacher?

        4. When are you going to start?

        5. That sounds good.

    B.  6. Yes, this is Mike speaking

        7. How often do you go to school

        8.Which subject do you like best

        9. Sure

        10. See you

七、1. What/How about going    2. so interesting      3. because of    4. some fresh air

    5. play a role      6. The less; the fewer      7. It’s not difficult for us        8. took; to get     

    9. With the help of      10. Let’s stop to have

八、favorite  else  serious  enough    healthy  about    habits  as  eating  tired