句型转换。

1. These tomatoes are ￥9. (对画线部分提问)

    ________ ________ are these tomatoes?

2. He likes green. (对画线部分提问)

    What ________ he like?

3. The girl is my sister. She is in red. (合成一个句子)

    The girl ________ ________ is my sister.

4. They have a new bike each. (改为同义句)

     ________ of them ________ a new bike.

5. They are white shirts. (改成单数句子) 

     ________ a white ________.

简述“三百千”简介。