单选题
Most of the villagers took part in the Dragon Boat races _____ 9:00 a.m._____ the morning of July 18.
题目答案
B
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答案解析
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辨析：介词 in,on 和 at 表达时间
介词 | 适用范围 | 例子 |
in | 指一段时间或与上午、下午、晚上、年、月、季节连用。 | in the morning/afternoon/evening,in 2020,in September,in summer |
on | 指在具体的某一天或某一天的某个时间。 | on the morning of Friday,on a windy night |
at | 1.后接具体的时刻； 2.用于和时间有关的固定短语。 | at six o'clock,at ten o'clock, at noon,at night |
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