13.　 Not only some other planets but also the earth ______ ( travel ) around the sun.

12.　 During the past 13 years , China ______( change ) a lot.

11.　 Where have you been while I ______ ( sleep )

10.　 It’s really ______ ( excite ) news.

C) 用所给动词的适当时态填空。

9.　　　 Who taught _____ ( they ) English last year? Mr Li did.

8.　　　 How many ______ ( woman ) teachers in your school?

7.　　　 You look ______ ( ill ) than yesterday. You’d better go and see the doctor.

6.　　　 Computers came into use in the ______ (forty ) of last century.

5.　　　 There is nothing in the box. It’s ______.

B) 用所给单词的适当形式填空。

4.　　　 The leaves of the trees fall in a_____.