Measures have been taken to prevent the river from____．
| A．having polluted | B．being polluting |
| C．being polluted | D．to pollute |
相关试题
They are letting us use their computer, and __________ we are giving them the results of our research.
| A．in charge | B．in place | C．in return | D．in a row |
There was a murder in one of the poorest suburbs in the city the other day. Now the police are turning the whole house upside down __________ clues.
| A．in want of | B．in search of | C．in favor of | D．in need of |
The fire，believed to due to illegal construction on the building’s roof, was brought
under control after an hour．
| A．have occurred | B．occur |
| C．have been occurring | D．be occurring |
When he applied for a in the office of the local newspaper he was told to see the manager
| A．location | B．situation | C．career | D．position |
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