Question

【题目】--Is your mother in? --No, she ____________ for three hours.

A. has left B. has been out C. went out D. has gone out

Answer 1

【答案】B

【解析】

试题分析：句意：—你妈妈在家吗?—不，她出去三个小时了。根据for three hours可知该用现在完成时，而且谓语动词必须是延续性动词。go out出去，是一个非延续性动词短语；be out外出，出去，是一个延续性动词短语。所以选B。