Could I use your English book,Jenny?Yes,of course_____.

问题描述:

Could I use your English book,Jenny?Yes,of course_____.
A.you could B.you might,C.you should D.help yourself
这个是不是习惯用语?

A这个是不是习惯用语?仅凭语感,没有解释。因为我语法不太懂,外国人讲英语,从来不讲语法的。