句型转换 1.When the UFO took off,the girl was waiting for a bus.（划线部分提问,逗号之前的）
题目
句型转换 1.When the UFO took off,the girl was waiting for a bus.（划线部分提问,逗号之前的）
2.The cook always has a good time on Sunday.（改为同义句）
The cook always ____ ____ on Sunday.
答案
1.When was the girl waiting for a bus?
2.enjoys himself.
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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