Good evening,I ___ to see Miss Mary.---Oh,good eveing.Sorry,but she is not in.
题目
Good evening,I ___ to see Miss Mary.---Oh,good eveing.Sorry,but she is not in.
A.have come B.come C.came D.had come
我自己也选的B，
答案
A答案没错,口语时用come没问题,但书面语时可用完成时来表示已发生事情并对现在产生影响的状态
已经到门口遭拒,前提是他已经到了
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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