句型转换。

1. Lucy usually cleans the cage every two days. (对画线部分提问)

    ______ ______ does Lucy usually clean the cage?

2. Jenny worked hard in order to catch up with others. (将简单句改为复合句)

    Jenny worked hard ______ ______ she could catch up with others.

3. Nothing is impossible if you put your heart in it. (改为反意疑问句)

    Nothing is impossible if you put your heart in it, ______ ______?

4. Mary came to China three years ago. (改为同义句)

    Mary has ______ in China since three years ago.

5. Zhai zhigang became the 1st Chinese astronaut to walk in space. (改为定语从句)

    Zhai zhigang became the 1st Chinese astronaut ______ ______ in space.