we must do as much as we can help the poor people
题目
we must do as much as we can help the poor people
he accepted his mother 's praise after he was elected chairman of the organization
答案
as much as we can 是do的修饰语,简化成we do sth to help the poor people,你就明白了,故需在do和help之间加动词不定式to
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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