Having checked the doors were closed, and ___ all the lights were off, the boy opened the door to h

题目简介

Having checked the doors were closed, and ___ all the lights were off, the boy opened the door to h

题目详情

Having checked the doors were closed, and ___ all the lights were off, the boy opened the door to his bedroom.
A.whyB.that
C.whenD.ours
题型:单选题难度:偏易来源:不详

答案

B
that在此用于引导宾语从句,用作动词check的宾语。句中的现在分词having checked带有两个宾语从句 (that) the doors were closed和that all the lights were off,只是前面一个宾语从句省略了引导词that。

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