A teacher said to a student,"You should study hard and ____ good student."

题目

A teacher said to a student,"You should study hard and ____ good student."
横线处该用be还是become,说一下原因,
原句为：A teacher said to her class,"You should study hard and ____ good students."
我为了捡懒才改了句，你们再看看吧！

答案

become
如果是be后面就应该是be a good student
而这种情况下become,turn等后面不加冠词