The government has been under growing pressure to ________ the causes of air pollution as smog frequently smothers the country's large cities.
A. release B. schedule
C. address D. maintain
How could you ________ such a fantastic job when you have been out of work for months?
A. turn off B. turn in
C. turn down D. turn to
Whether the buildings in this area should be pulled down has remained ____；people are still looking for other possible solutions.
A. unchallenged B. relevant
C. controversial D. contradictory
I________through that bitter period without your generous help.
A. couldn't have gone B. didn't go
C. wouldn't go D. hadn't gone
—I wonder ________ Mary has kept her figure after all these years.
—By working out every day.
A. where B. how
C. why D. if
The Australian boy has a good ________of Chinese and can communicate with others freely.
A. request B. command
C. demand D. usage
