Do you have any idea when the probllem was settled?
题目
Do you have any idea when the probllem was settled?
It was not until last Friday ______ we had a chance to discuss it thoroughly.
A.that B.when
为什么
答案给的是B
答案
B .这是对 状语强调 的强调句型 主句省略了.
原句 =it was not until last Friday when we had a chance to discuss it thoroughly .
that the probllem was settled.
= the probllem was not settled until last Friday when we had a chance to discuss it thoroughly .
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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