by和before用法上有什么的区别,下面这道题要选什么?Friday is the last day.Can you finish the work ___Friday?I am afraid I can't give you an answer now ,but I will reply___you on Friday morning.A.before;to B.by;in C.before;in D.by;to

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by和before用法上有什么的区别,下面这道题要选什么?Friday is the last day.Can you finish the work ___Friday?I am afraid I can't give you an answer now ,but I will reply___you on Friday morning.A.before;to B.by;in C.before;in D.by;to
by和before用法上有什么的区别,下面这道题要选什么?
Friday is the last day.Can you finish the work ___Friday?
I am afraid I can't give you an answer now ,but I will reply___you on Friday morning.
A.before;to B.by;in C.before;in D.by;to

by和before用法上有什么的区别,下面这道题要选什么?Friday is the last day.Can you finish the work ___Friday?I am afraid I can't give you an answer now ,but I will reply___you on Friday morning.A.before;to B.by;in C.before;in D.by;to
选择 :D .by Friday :截止星期五.reply to Someone :回复某人.
by + time :表示截止到那一时间点为止.
before + time :指的是在那个时间点以前的时间.