--Haven't you seen Mr. Wilson at the lecture?--Yes, but he had left _________ I could ask him a

题目简介

--Haven't you seen Mr. Wilson at the lecture?--Yes, but he had left _________ I could ask him a

题目详情

--Haven't you seen Mr. Wilson at the lecture?
--Yes, but he had left _________ I could ask him any questions.
A.whenB.beforeC.afterD.as
题型:单选题难度:中档来源:不详

答案

B
此题考察的是过去完成时,had +动词的过去分词,表示发生在过去的过去的事情。

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