题目：
句型转换。
1. I don't think he can swim across the Changjiang River. (改为同义句)
I don't think he is _____ _____ swim across the Changjiang River.
2. You should walk your dog once a week. (对划线部分提问)
_____ _____ should you walk your dog?
3. We must clean our classroom every day? (对划线部分提问)
_____ must we _____ every day?
4. Walk the dog at 7 a.m.. (改为否定句)
_____ _____the dog at 7 a.m..
5. His dog is the cleverest of all. I don't think so. (合并为一句)
I _____ think his dog _____ the cleverest of all.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：E
