— Why does the lake smell terrible?
— Because large quantities of water ____.
| A．have polluted | B．is being polluted |
| C．has been polluted | D．have been polluted |
It is ______ ill health that she is now not so active in the movement.
| A．instead of | B．in place of |
| C．thanks to | D．in face of |
The plan to be carried out next month needs______ among the members of the labor union before ______.
| A．to discuss; carrying out |
| B．to be discussed; carried out |
| C．discussing; being carried out |
| D．discussed; to be carried out |
There is only 10 minutes _______. I must _______. ----- I’ve got to catch the train.
| A．left; dash | B．remaining; dash |
| C．left; arrive | D．remaining; arrive |
________, most teenagers now listen to rock music. However, John likes classical music better.
| A．In a word | B．In general |
| C．In time | D．In total |
As nobody here knows what is wrong with the machine, we must send for an engineer to ______ the problem.
| A．handle | B．raise | C．face | D．present |