题目内容：

 

1.The number of the students _________(be) 2,500 in the school last year.

2.Neither you nor Jim ___________(be ) there before.

3.Wearing red can make it easier ____________(take) action.

4.You will ___________(require) to do it again if you make many mistakes.

5.Our math teacher devotes all his time to ___________(teach) us.