句型转换。 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 _____.