Having checked the doors were closed, and ________all the lights were off, the boy opened the door t

题目简介

Having checked the doors were closed, and ________all the lights were off, the boy opened the door t

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.why  
B.that
C.when  
D.where
题型:单选题难度:中档来源:同步题

答案

B

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