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Why hasn't he come? ______on time, we will have to put off the trip.

A、If he doesn't come

B、If he won't come

C、If he shouldn't come

D、If he hadn't come

时间：2021-12-31 20:21 关键词：

答案解析

A
    16．答案为A  从句中的we will...可判断出空白处应为一个时间状语从句，具谓语要用一般现在时代替一般将来时。