I often go hiking on Sundays.I often go shopping on the weekend.（疑问词用when或what）
题目
I often go hiking on Sundays.I often go shopping on the weekend.（疑问词用when或what）
问：第一句：疑问词go hiking 第二句：疑问词go shopping
答案
第一句：What do you often do on Sundays?
第二句：What do you often do on the weekend?
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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