John, you _______ stay out too late. Your mother will worry about you.
| A．needn’t | B．shouldn’t |
| C．must | D．can |
I'm sorry I can't stop with you. I have much work to do.
| A．to talk | B．talking | C．talk | D．talked |
The windows after school is over.
| A．usually close | B．usually closed |
| C．are usually closed | D．are usually closing |
The factory has been closed a year ago.
| A．already | B．since | C．for | D．yet |
There_____ a hospital in my hometown fifty years ago.
| A．had | B．was used to | C．were | D．used to be |
---Mum, may I go out to play football this afternoon?
---You can if your homework .
| A．is done | B．will do | C．has done | D．will be done |