問題詳情

29. By the time the bomb exploded, all the people _________ the building safely. No one was hurt.
(A)had been left
(B)have left
(C)left
(D)had left

參考答案

答案:D
難度:適中0.618892
統計:A(216),B(73),C(62),D(570),E(0)

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