the morning a________was cool and felt wind on my face
题目
the morning a________was cool and felt wind on my face
答案
air
（One day while I was (1)w_______ on the street,a young man ran ...The morning air was cool and I felt wind on my face.This made us ...）
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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