You _____ not have seen her yesterday,for she was abroad.
题目
You _____ not have seen her yesterday,for she was abroad.
A.must B.should C.could D.would
答案
C
表示否定定猜测,你昨天不可能看到她,因为她出国了
must have done表看到猜测,肯定做了某事
should have done本该做的事情却没有做
would have done过去认为将来会做的事
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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