Mike did his homework two hours ago.(改疑问句）是不是用did提问?

题目

Mike did his homework two hours ago.(改疑问句）是不是用did提问?
Hurry up!Or you will miss the train.(改为同义句）
He has fifteen bikes to fix up.(对划线部分提问））这句是用HOW LONG吗
我英语基础不好,有些做不来

答案

Did Mike do his homework two hours ago?
If you don't hurry up,you'll miss the train.
You'll miss the train unless you hurry up.
How many bikes does he have to fix up?

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