__ did you finish the work ---About a week .A.when B.how long C.how often D.how many .

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__ did you finish the work ---About a week .
A.when B.how long C.how often D.how many .

finish 是一个瞬间动作,不能用一段时间来回答.
选 C how often
你多长时间完成一次工作?大约一星期.

B,how long多长时间