He is clever and also works______,so he can work out such a ___math problem
题目
He is clever and also works______,so he can work out such a ___math problem
A hard ,hardly B hardly,hard C hard ,hard D hardly,hardly
答案
C
hard这个词比较特殊,既可以用作副词,又可以用作形容词.
第一空,hard作副词 “努力地”,修饰动词works；第二空hard作形容词,“难的”修饰名词problem
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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