--- This article is a little bit easy.______________ read something difficult?.
题目
--- This article is a little bit easy.______________ read something difficult?.
--- This article is a little bit easy.______________ read something difficult?
A.Why not toB.Why don'tC.Why notD.Why not you
答案
C why not do sth = why don't you do sth?
为什么不做某事呢?
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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