----My room gets very cold at night.
---____________.
| A．So is mine | B．So mine is | C．So does mine | D．So mine does |
By the time he was ten,Edison______experiments in chemistry.
| A．had already done | B．already had done |
| C．was already doing | D．already did |
______,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 |