造五个介词后面接动名词的句子
题目
造五个介词后面接动名词的句子
答案
we have to prevent the air from being polluted.
they went on walking and never stopped talking.
sally is afraid of not being chosen to enter the competition.
i am looking forward to meeting you again.
keep on fighting,do not give in.
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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