改错：1.They will arrive the town in half an hour.
题目
改错：1.They will arrive the town in half an hour.
2.How careful he is writing
3.He was sleeping while I saw him.
4.I am better in reading than listening
答案
They will arrive in the town in half an hour.
How carefully he is writing!
He was sleeping while I was looking at him./ He was sleeping when I saw him.
I am better at reading than listening.(be good at)
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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