you must finish the work_______ seven o'clock this eveningA.by B.until C.to D.in选哪个?为什么?原因!
问题描述：
you must finish the work_______ seven o'clock this evening
A.by B.until C.to D.in
选哪个?为什么?原因!
答
A,在...之前
答
a
截止到什么时候
答
A
表示在。。。之前的意思
答
by 在....之前
答
选A,意思是,在今晚O点前你必须把工作做完.
You must finish the work by seven o'clock this evening.
by+时间表,在某时间前,故定搭配,其它三个不合句意.