he was born on Sunday提问
题目
he was born on Sunday提问
He was born on _sunday_划线提问
_what _day _ was he born on ?
那么,如果说是,he was born in January.或者是 he was born in 1983.这两个应该怎么提问呢?（born后面的介词是否应该相应变化?疑问词用what time还是别的）
答案
On what day was he born?
In what month was he born?
In which year was he born?
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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