問題詳情

29. By the time Eric arrived at the airport, the airplane ______ for ten minutes.
(A) leaves
(B) left
(C) has left
(D) had left

參考答案

答案：D
難度：簡單0.819444
統計：A(2),B(1),C(8),D(59),E(0)

用户評論

【記憶吐司】評論

[ By the time ]引導的子句可以描述過去，主要子句要用過去完成式。