Did you have a nice holiday? Yes, thank you. We went to Shanghai ( )a week.
题目
Did you have a nice holiday? Yes, thank you. We went to Shanghai ( )a week.
A.in B.on C.at D.for
答案
选D,for+一段时间
你的假期过得愉快吗?——是的,我们去上海呆了一个星期
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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