Question

Echo _____ for half a month. She’ll come hack in two months.
A. left   B leave  C. has left    D. has been away

Answer 1

D

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。