句型转换，每空一词。

1. This white bag is three dollars.(对画线部分提问)

    _____ _____ is this white bag?

2. The price of these pants is 15 dollars.(改为同义句)

    These_____ _____ 15 dollars.

3. What can I do for you?(改为同义句)

     _____I_____ you?

4. Is this pencil two yuan?(作否定回答)

    No, _____ _____．

5. My sweater is white.(对画线部分提问)

    _____ _____ is your sweater?