句型转换。

1. Mr. Zhou usually goes to work by bus. (就划线部分提问)

   _______ does Mr. Zhou usually_______ to work?

2. He always walks to school. (否定句)

    He _______ _______to school.

3. Tom is 12. Steve is 13. (合并句子)

   Tom is_______ ________ Steve.

4. Let's go boating in Zhongshan Park, OK? (同义句)

    _______ ________ go boating in Zhongshan Park?

5. Can you tell me how to get to the cinema? (同义句)

    Can you tell me the________ ________ the cinema?

一般为提高管材的耐腐蚀性，常在管材表面镀锌。