7．Mothers can’t leave the children by 　　　　　　　　　(they).

6．He 　　　　　　　(speak) English very well two years ago.

5．Mr. Hu stood at the 　　　　　　　　　(start) line.

4．The Yellow River is one of the 　　　　　　　　(long) ones in China .

3．He wants to be a good football 　　　　　　(play) in the future.

2．I live on the 　　　　　　　　(three) floor.

1．I often saw her 　　　　　　　(carry) water for Granny Li .

20．(　 )It began to rain, but the farmers still went on 　　　in the fields.　　　

A. work　　　　　　　　 B. to work　　 　　C. worked　 　　　D. working

19．(　 )You’d better 　　　a noise.　　

A. not make　 　　B. not to make　　　 　　 C. don’t make　　 D. not making

18．(　 )When Mrs. Read got back home last night. Tom 　　　a book.

A. read　　 　　　　 B. is reading 　　　 C. was reading 　　 　D. is going to read