A. | at | B. | of | C. | in | D. | with |
分析 MU522航班将会在七点半起飞.
解答 答案:A.句中的half past seven是具体的时间七点半,具体的时间点前面的介词用at,故选A.
点评 at表示“在某一时刻,某一时点”.如:I get up at 6:00 every day.我每天6点起床.
注:at daybreak在黎明;at noon在中午;at night在夜间;at Christmas在圣诞节期间;at the age of five在五岁时.
on表示“在具体某一天或某天的上、下午”.如:
I heard a shot on (the morning of ) March 18.三月十八日(早晨) 我听到一声枪响.
in表示“在某世纪、年、季度、月、周”以及泛指的上、下午、晚上
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