I went to see you yesterday,but you were not at home.
题目
I went to see you yesterday,but you were not at home.
II went to see you yesterday.,but you were not at home.
Oh,I() with the farm work.
A.am helping B.have helped C.was helped D.was helping
请问：
答案
D是的,因为这是针对于那个人昨天去拜访你而说的,所以回答要说,在他去拜访你时,你｛那时正在!｝干什么,所以他没见到你
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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