If we had taken such effective measures much earlier, the river ________ so seriously now.
| A．is not polluted |
| B．would not be polluted |
| C．had not been polluted |
| D．would not have been polluted |
This stadium has _____ many thrilling football games.
| A．seen |
| B．watched |
| C．looked at |
| D．experienced |
Is the hotel _____ offered you a job _____ you stayed the first time you arrived here?
| A．which; where |
| B．the one; in which |
| C．where; that |
| D．the one that; which |
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 |