He had to pause from time to time to wipe the sweat from his forehead，because the air-conditioning system __________.
| A．broke in |
| B．broke up |
| C．broke out |
| D．broke down |
_____ a pity that I forgot to bring your dictionary.
| A．It’s | B．This is | C．That’s | D．There’s |
We were told to have our reading room_____ after school.
| A．clean | B．to clean | C．cleaning | D．cleaned |
Only if you put your heart into your learning,_______.
| A．can you succeed | B．you can succeed | C．that you can succeed | D．can that you succeed |
The girl ______ in red is a friend of mine.
| A．dressed | B．dressing | C．dresses | D．dress |
Mr Smith stood up in defence of the 16-year-old boy, saying that he was not the person ______.
| A．blamed | B．blaming | C．to blame | D．to be blamed |