.--are they staying in Beijing?----For three days. A. How often B. How longC. How oldD.

发布时间：2020-08-22 01:56:09

. ----    are they staying in Beijing?
----For three days.
A. How often
B. How long
C. How old
D. How soon

网友回答

A. How often
(答案→)B. How long
C. How old
D. How soon
解析：for three days表示的是时间段，故用how long 来提问。
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