______environmental damage is done，it takes many years for the ecosystem to recover.
| A．Eyen if | B．If only | C．While | D．Once |
______,the boy couldn’t enter his house.
| A．Since the key had lost | B．T he key being lost |
| C．Lost the key | D．Having lost the key |
Be quick,or you’ll get______in the rain.
| A．to be caught | B．catching | C．to catch | D．caught |
He insisted______the working site.
| A．to be sent to | B．being sent to |
| C．on being sent to | D．that to be sent to |
It is not unusual for workers in that region______.
| A．to be paid more than a month later | B．to be paid later than more a month |
| C．to pay later than a month more | D．to pay later more than a mon th |
A Dream of the Red Chamber is said______into dozens of languages in the last decade.
| A．to have been translated | B．to be translated |
| C．to translate | D．to have translated |