The guests ______ finally arrived.
题目
The guests ______ finally arrived.
A.we had been waiting for B.whom we had been waiting
C.for who we had been waiting D.who had been waiting for
我认为A和D都是可以的呀（如果错的话,错在哪呢?正确的应该选什么呢?我题目做晕掉了``` OMG~
答案
A正确
D 应该改为 who WE had been waiting for
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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