the flower is open ____ the day and closed ____ night.A.on at B.f_英语解答

the flower is open ____ the day and closed ____ night.A.on at B.for in C.during at D.about at

人气：267 ℃　时间：2020-02-05 06:22:05

解答

C
固定用法：
during the day 在白天
at night 在夜里
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