{01}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
解析: 试题分析:句意:已经检查完门是关着的,所有的灯都灭了,这个男孩打开了他的卧室的门。这里逗号后是一个句子,逗号前是非谓语动词的形式,and连接的是Having checked的两个宾语,宾语从句不缺成分故用that,故选B。 点评:本题难度适中。这里考查的宾语从句的连词,that在宾语从句中不做成分,一般可省略,但是当有两个从句并列时,后面的从句的连词that不能省略。 即学即练:Did he point out ______ you were wrong? A. why B. that C. when D. where 解析:D。句意:他有没有指出你什么地方错了? 本题选B。
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