The plane will take off three hours．I must get to the airport right now．( )A．inB．forC．onD．at 题目和参考答案——青夏教育精英家教网——

题目内容

19．The plane will take off _________ three hours．I must get to the airport right now．（　　）

A．

in

B．

for

C．

on

D．

at

分析翻译：飞机将在三小时内起飞．我必须立刻去机场．

解答答案：A．泛指一般意义的上午、下午或晚上以及某月或某年，将来时态表示"过一段时间后"，一般用介词in；跟段时间连用用for；若表示星期几或某一特定的日期，则用on；表示时间的某一点、某一时刻或年龄等用at；故选A．．

点评本题主要是区分in、for、on、at四个介词，了解它们的用法是解题关键．

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