A:1.___________ are you going
题目
A:1.___________ are you going
B:I am going to Beijing.
A:2.____do you want to do there?
B:I want to visit all the famous places.
A:Did you go there before?
B:No,I 3.____.It is my 4.____time to 5._____there
A:6.____________a good time
B:Thank you
答案
Where
What
didn't
first
go
Have
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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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