Marcia is going ___ her mother__ the housework.A help;with B to help;with C help; for D helping;for
题目
Marcia is going ___ her mother__ the housework.A help;with B to help;with C help; for D helping;for
答案
B
be going to do sth
help sb with sth
都是固定短语
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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