问题描述：
Sandy often catches a fish within five minutes (用may改写）
My sister could draw well when she was young (同义句）
My sister ___ ___ ___ ____ well when she was young
They didn't go boating,They went swimming.(同上）
We can't live if there's no air or water.(改为简单句）
My sister could draw well when she was young (同义句）
My sister ___ ___ ___ ____ well when she was young
They didn't go boating,They went swimming.(同上）
We can't live if there's no air or water.(改为简单句）
问题解答：
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