提问three times a week用什么疑问词

题目

提问three times a week用什么疑问词
He goes to the library three times a week.对划线部分three times a week提问
He exercises for 10 hours a week.对划线部分for 10 hours提问
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答案

He goes to the library three times a week.对划线部分three times a week提问how often does he go to the library?He exercises for 10 hours a week.对划线部分for 10 hours提问how long does he exercise a wee...