---It is better__him the bad news now.---Yes,better__
题目
---It is better__him the bad news now.---Yes,better__
it as a secret.
A.not tell,keep B.not tell,to keep C.not to tell,to keep
D.not to tell,keep
答案
D
it is better not to do sth.(it is better not to tell)
yes,better keep.=yes,you'd better keep
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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