1They went to school at 6:00.改为疑问句：（ ）（ ）did they go to school?My 2.mother is watering
题目
1They went to school at 6:00.改为疑问句：（ ）（ ）did they go to school?My 2.mother is watering
flowers in the farden.(对划线部分提问:watering flowers):What ( )your mother ( )in the garden?3.He did homework in the classroom.(改为否定句）：He( )( )his homework in the classsroom.
答案
1.What time did they go to school?
2.What is your mother doing in the garden?
3.He didn't do his homework in the classromm.
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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