题目内容
-- _____________did your uncle leave his hometown ?
--He ____________ for nearly twenty years.
A. When, has left
B. When, has been away
C. How long, has left
D. How long, has been away
【答案】
B
【解析】根据答语内容可知问的内容可知答案为B,for +一段时间,用have been aways,表示,故选B
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