He --you more help,even though he was very busy.
题目
He --you more help,even though he was very busy.
A.might have given B.might give C.may have given D.may give
A和C哪不同呢?
答案
A可以用于过去时,根据本句的时态应该选A
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
最新试题
热门考点