---Don’t you think it necessary that he ____ to
题目
---Don’t you think it necessary that he ____ to
Miami but to New York?
---I agree,but the problem is _____ he has refused to.(2005江苏)
will not be sent; that
B.not be sent; that
C.should not be sent; what D.should not send; what
为什么选B?
答案
B.it's necessary that...sb.(should) do sth.用原型
the problem is that...问题是
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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