1· “This is all what Dr·Smith said at the meeting."
题目
1· “This is all what Dr·Smith said at the meeting."
还有2 "He promised to come and see us after the supper."3."John come here to see you,but he left five minutes ago."4." I've heard him but I never know him."
答案
1.what 应该是 that,（定语从句的关系词）
2.去掉 the
3.come 应该是 came
4.heard 应该是 heard of "听说"
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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