The sick children _______(send)to the hospital.The doctors and nurses are taking care of them now
题目
The sick children _______(send)to the hospital.The doctors and nurses are taking care of them now
答案
注意3处,1主动与被动,2时态,3单复数.该句被动和复数是肯定的,至于时态由于前后逻辑不明显,可以由两种表达：
were sent
have been sent
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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