根据要求进行句型转换句转换。

1. Why don't you go to the Summer Palace7(同义句转换)

________ ________go to the Summer Palacer?

2. To fly to Australia is his greatest wish. (用 it作形式主语改写此句)

________ ________his greatest wish________fly to Australia.

3. He doesn't know where he should visit. (改为简单句)

He doesn't know________ ________ ________.

4. My vacation was very interesting.(对画线部分提问)

________was________vacation?

5. Her grandfather is too old to travel around. (同义句转换)

Her grandfather  is_______old ________he ________travel around any________.