must would
题目
must would
Jack describe his father, who----a brave boy many years ago, as a strong-willed man.
A.would be B. would have been C. must be D. must have been
答案
D.
Jack describe his father as a strong-willed man who (must have been) a brave boy many years ago.
杰克把他的父亲描述成一个意志坚强的人,想必其在多年前一定也是个勇敢的男孩
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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