It took him a year to finish his novel的同义句
题目
It took him a year to finish his novel的同义句
对不起刚刚有人回答我点错了在发一下
答案
He spent a year on finishing the novel.
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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