--- May I go swimming now?
--- No, you ______. You must finish your homework first.
| A．mustn’t | B．may not |
| C．couldn’t | D．needn’t |
_____ middle school students allowed to use mobile phone at school ?
| A．Do | B．Did | C．Are | D．Can |
Great changes _____ in my hometown since 1980.
| A．have been taken place | B．have taken place |
| C．took place | D．were taken place |
About of the students in our class come from the countryside.
| A．two- five | B．two- fifth |
| C．two - fifths | D．second – fifth |
I had a little trouble English grammar.
| A．to learn | B．learning | C．learned | D．of learning |