–May I smoke here ?
- If you ____, choose a seat in the smoking section.
A. should B.could C. may D. must
Five people won the “China’s Green Figure”award, a title ____ to ordinary people their contributions to environmental protection.
A.being given B. is given C. given D. was given
Although the causes of cancer ____, we do not yet have any practical way to prevent it.
A. are being uncovered B. have been uncovering
C. are uncovering D. have uncovered
____ team wins on Saturday will go through to the national championships.
A. No matter what B. No matter which C Whatever D. whichever
We’re just trying to reach a point ____ both sides will sit down together and talk.
A. where B. that C. when D. which
Someone who lacks staying power and perseverance is unlikely to ___ a good researcher.
A. make B. turn C. get D. grow
