改错Mary asked me tat if I would go to the concert with her that evening.并且说明原因
题目
改错Mary asked me tat if I would go to the concert with her that evening.并且说明原因
答案
Mary asked me 【去掉that】 if I would go to the concert with her that evening.
if 可以直接引导宾语从句,that是多余的
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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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