问题
选择题
--- ________ do you help your mother clean the house?
--- Once a week.
A．How far
B．How long
C．How soon
D．How often
答案
答案：D
本题的回答语表示的是频率，对此提问用how often，故本题选D。
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--- ________ do you help your mother clean the house?
--- Once a week.
A．How far
B．How long
C．How soon
D．How often
答案：D
本题的回答语表示的是频率，对此提问用how often，故本题选D。