12.I ____ the paper after lunch.That’s one of the things I really enjoy.
题目
12.I ____ the paper after lunch.That’s one of the things I really enjoy.
A.used to read B.am used to reading C.use to read D.have used to read
答案
习惯做某事是be used to doing
过去常常做某事,现在不做:used to do sth.
选B
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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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