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---You look very healthy. ________do you exercise?
-----I exercise three times a week.

A.How often B.How many
C.How much D.How soon

A

解析试题分析:句意:你看起来很健康。你多久锻炼一次?我每周锻炼三次。How often多久一次,对动作发生频率提问;How many多少,对可数名词的量提问; How much多少,对不可数名词的量提问;How soon多久以后,对短语“in + 一段时间”提问。所以选A。
考点:考查疑问短语。

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