一Look at the lights in the lab!Who is there? 一Oh,I forgot( ).

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问题 一Look at the lights in the lab!Who is there? 一Oh,I forgot( ).

选项 A、to turn them down
B、to turn them off
C、turning them down
D、turning them off

答案B

解析 forget to do sth.忘记去做某事,forget doing sth.忘记做过某事,turn down关小,turn off关闭。此处表达“忘记关灯”,选B。
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