He claimed _______in the supermarket when he was doing shopping yesterday.
题目
He claimed _______in the supermarket when he was doing shopping yesterday.
A.being badly treated B.treating badly
C.to be treated badly D.to have been badly treated
why?
答案
D.to have been badly treated
因为是昨天的事.
所以要用完成式.
他声称,被很恶劣对待.
有影响,显然是完成好些.
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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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