25. For many cities in the world, there is no room to spread out further, _____New York is an example.
| A．for which | B．in which | C．of which | D．from which |
For some time the expert __________ people of the health risks caused by passive smoking. He says he won't stop until all the smokers around him decide to quit smoking.
| A．is warned | B．is warning | C．has been warning | D．has been warned |
—_____ that he picked up French?
—It was in 2010_____ he traveled in France.
| A．Was it when; that | B．When was it; that |
| C．Was it when; when | D．When was it; when |
Have you ever stopped _____ how our lie _____ if the world ran out of ol?
| A．to think, would change | B．thinking, would change |
| C．to think, will change | D．thinking, should change |
George could not speak Italian so he an Italian girl to work as an interpreter.
| A．hired | B．accompanied | C．instructed | D．directed |
She wrote a month ago, ______ we’ve heard nothing.
| A．since when | B．before which | C．since that | D．after which |