1)They usually have a Party meeting on Saturday afternoon, _______?
题目
1)They usually have a Party meeting on Saturday afternoon, _______?
A. don’t they B. haven’t they C. do they D. have they
(2)He hasn’t any brothers, ______?
A. has he B. does he C. hasn’t he D. A and B答案和理由,谢谢
答案
反义问句的原则是前面肯定,后面否定.前面否定,后面肯定.
A have 【举行】动作动词,故借助于助动词.
A has 【有】,由于前面是hasn't,has的否定没有借助于助动词.故用has.
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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