he could do nothing except ___ TV.
题目
he could do nothing except ___ TV.
1.watch 2.watching
maybe he put it in his pocket,__he?
1.doesn't 2.didn't
答案
he could do nothing except __2_ TV.介词后接动名词
1.watch 2.watching
maybe he put it in his pocket,_2_he?一般过去式
1.doesn't 2.didn't
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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