The problem of air pollution is becoming more serious ______ the increasing number of cars.
| A．as for | B．because | C．as a result | D．as a result of |
A group of American soldiers were walking along the road in Irap when a bomb was _____, three of whom were killed.
| A．set about |
| B．set out |
| C．set up |
| D．set off |
A new school was _____ up in the village last year.
| A．held |
| B．set |
| C．sent |
| D．brought |
Someone called me up in the middle of the night, but they hung up _____ I could answer the phone.
| A．as |
| B．since |
| C．until |
| D．before |
Peter’s mother kept telling him that he should give up smoking, but _____ didn’t help.
| A．he |
| B．which |
| C．she |
| D．it |
It’s quite different from _____ I read last month.
| A．that |
| B．which |
| C．the one |
| D．the one what |