He spends more than an hour (exercise ) every day

问题描述:

He spends more than an hour (exercise ) every day

答案:
He spends more than an hour (exercising ) every day.
翻译:他每天花一个多小时做练习.
特别说明:
spend 主语是人,搭配结构为:spend ...on sth / doing sth.
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