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        1.  Echo _____ for half a month. She’ll come hack in two months.

          A. left   B leave   C. has left    D. has been away

          D

          解析:考查動詞時態(tài)。根據(jù)for half a month為一段時間,動詞得用延續(xù)性動詞,應(yīng)用現(xiàn)在完成時態(tài)。同時句意:她將兩個月后回來。說明已經(jīng)離開。A和B排除,C不能與時間段連用。

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