We’d better not keep the lights when we have PE classes outside.A. off B. onC. open D. cl

发布时间：2020-08-22 21:56:03

We’d better not keep the lights     when we have PE classes outside.
A. off
B. on
C. open
D. closed

网友回答

A. off
(答案→)B. on
C. open
D. closed
解析：句意：当我们在外面上体育课时，我们最好不要保持灯开着。keep sth on保持…开着。on 介词在这里作特殊用法相当于形容词，开着的。故选B.
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