1. 按要求改写句子, 每空一词。

1. （1） Tim didn't go to China. (用never和before改写句子)

   Tim    to China before.

3. （2） They have planted some trees on the mountain so far. （改为否定句）

   They    trees on the mountain so far.

5. （3） Daming has learned how to look after  himself. (改为一般疑问句)

    Daming  how to look after himself?

7. （4） Amy began to live in China five years ago. (改为同义句)

   Amy   in China  five years.

9. （5） Have your parents ever visited the Great Wall? (作肯定、否定回答)

    , they . /  , they .