题目内容

— ____ are you staying in Shanghai?

— For about half a month.

A. How long B. How often C. How many D. How soon

A 【解析】句意:——你在上海呆多久?——大约半个月。A. How long多长时间;B. How often多久一次;C. How many 多少;D. How soon多久以后。For about half a month.表示的是时间段,故答案为A。
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