—_____we keep the window _____ all the time?
—No, you don’t have to .
| A．Can; opening | B．May; opened |
| C．Must; opening | D．Could; to open |
My mother prefers to take a bus to her office________she has a car of her own．
| A．if | B．because | C．although | D．until |
She wants to________her job and go to study in Australia．
| A．grow up | B．wake up | C．pick up | D．give up |
The boy won the English speech competition，so his parents were________him．
| A．angry with | B．proud of | C．interested in | D．disappointed at |
—Who will be responsible the matter？
—Mr.Zhang．
| A．with | B．of | C．for | D．from |
—Look！Some people are running the red lights．
—We should wait________others are breaking the rule．
| A．if | B．unless | C．although | D．because |