Sometimes____turns off the lights in the classroom, because everybody thinks somebody will do it.
| A．anybody | B．somebody |
| C．nobody | D．everybody |
One of the suspects is _________ schoolboy.
| A．a 18-year-old | B．an 18-years-old |
| C．a 18 years old | D．an 18-year-old |
When I got to the cinema, the film ___________ for 15 minutes.
| A．has begun | B．has been |
| C．had begun | D．had been on |
It is reported that the victim was attacked _______ a gun_______ a short, fat man.
| A．by, with | B．with, by | C．for, to | D．to, for |
Not only the students but also the teacher ___ enjoying the film at 9 pm yesterday.
| A．has been | B．was | C．are | D．is |
You ________ play with the knife. You ________hurt yourself.
| A．mustn’t; may | B．mustn’t; must |
| C．shouldn’t; must | D．can’t; should |