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________.