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

发布时间：2020-08-22 23:27:03

----    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：How often 多久一次；How long多长；How old 多大；How soon多久。根据下文答语，大约三天。可知上文提问时间长短，故选B。
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