句型转换。1. The trip is eight hours. (对划线部分提问)
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2. We have PE classes twice a week. (对划线部分提问)
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3. He can write them a letter. (一般疑问句)
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4. Remember to write to me. (同义句)
_________________________________________________________1. How long is the trip?
2. How often do you have PE classes?
3. Can he write them a letter?
4. Don't forget to write to me.