Before we left the room the chairman made sure______the lights were turned off.

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问题 Before we left the room the chairman made sure______the lights were turned off.

选项 A、if
B、which
C、when
D、that

答案D

解析 make sure表示“弄清楚”，后常接that引导的宾语从句。

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公共英语二级笔试

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