Each of the students ___a new eraser and the each ___ a new ruler,too.
题目
Each of the students ___a new eraser and the each ___ a new ruler,too.
A has;has B has;have C have;has D have; have
上面的题目打错了：Each of the student ___a new eraser and they each ___a new ruler ,too.
答案
b,前一个空主语是单数each,后一空主语是复数they
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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