根据要求进行句子变换。
1. The girl has had the silk hat for three years.(改为一般过去时)
The girl _______ the silk hat three years _______.
2. Where shall I buy Christmas presents? Could you tell me? (改为复合句)
Could you tell me_______ Christmas presents?
3. We plant millions of trees in North China. (改为被动语态)
Millions of trees_______ in North China.
4. English is the most widely spoken language in the world. (改为同义句)
English is _______ spoken than any other language in the world.
5. I don't know where I should go. (改为同义简单句)
I don't know _______.
