I think that something has to be done to stop the air from being polluted, ______ ?
A. doesn't it B. don’t I C. don't they D. haven't they
It has been reported that some government leaders ______ their authority and position to get illegal profits for themselves.
A. overlook B. employ C. abandon D. abuse
Let's learn to use the problem we are facing ______ a stepping-stone to future success．
A. to B. for C. as D. by
His novels sell best and have made him famous, but before that no one could have imagined how great a role he ______ in the literary world．
A. had played B. has played C. is playing D. was to play
When dealing with students, teachers are supposed to adopt ______ and caring approaches, as they are unique young individuals of different personalities.
A. abstract B. efficient C. flexible D. effective
As for diet, Michael Jackson chooses vegetables and fruit in ______ to any kind of meat.
A. comparison B. preference C. control D. advantage
