问题
选择题
Echo _____ for half a month. She’ll come hack in two months.
A. left B leave C. has left D. has been away
答案
答案：D
考查动词时态。根据for half a month为一段时间，动词得用延续性动词，应用现在完成时态。同时句意：她将两个月后回来。说明已经离开。A和B排除，C不能与时间段连用。
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