I was disappointed with the film.I had expected it to be much better.
题目
I was disappointed with the film.I had expected it to be much better.
这句中为什么用it不用that,this或one
我希望就对于这句而言
答案
因为it指代film 一般情况下我们用it指代前面提到过的东西.而不是that this one
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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