. -May we leave the classroom now?
-No, you ______. You ______ to leave until the bell rings.
| A．mustn’t, are allowed | B．don’t have to, are supposed |
| C．needn’t, aren’t allowed | D．can’t, aren’t supposed |
_____ prepare for the coming exam, Dave stays up late every night.
| A．In order to | B．Since then |
| C．As a result | D．Because of |
We can’t put off _____ a plan. We should do it right now.
| A．make | B．to make | C．made | D．making |
--- The twin boys look sad. Let’s _____ .
--- OK!
| A．cheer him up | B．cheer up him |
| C．cheer up them | D．cheer them up |
I saw a dog _____ on the side of the road when I passed by.
| A．to lie | B．lied | C．lying | D．lie |
To _____ surprise, no one volunteered for the position of monitor.
| A．the teacher’s | B．the teacher |
| C．the teachers | D．the teacher is |