求过去完成时的被动语态的例句 5句!
题目
求过去完成时的被动语态的例句 5句!
答案
100 tractors had been produced by the end of last year.He had been told many times not to be late.A power station had been set up in their home town.We had been warned to be careful of rats.She told u...
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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