如何用be on the point of doing,make a point of doing ,there is no point in,to the point 来造句?
题目
如何用be on the point of doing,make a point of doing ,there is no point in,to the point 来造句?
答案
I was on the poing of leaving home when the phone rang.
I made a point of closing all the windows before leaving the house.
There is no point in doing such silly things one more time.
Your answer is to the point.
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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