1. A_________ gain or profit is the actual gain after all working expenses have been paid.
　　A. gross
　　B. net
　　C. positive
　　D. negative

　　2. A better working environment improves people's performance, and _________ productivity.
　　A. furthermore
　　B. hence
　　C. moreover
　　D. even

　　3. A completely new situation will ________ when the examination system comes into exist-ence.
　　A. rise
　　B. arise
　　C. raise
　　D. arouse

　　4. A cork will ________ in water, but a stone sinks.
　　A. fly
　　B. flow
　　C. float
　　D. drift

　　5. A dark suit is preferable _________a light one for evening wear.
　　A. to
　　B. than
　　C. for
　　D. against

　　6. A deputy director will be _________the whole factory next week when the director is away for a month.
　　A. in favor of
　　B. in charge of
　　C. in place of
　　D. on behalf of

　　7. A few minutes after the plane had taken off, it _________to the ground,
　　A. crashed
　　B. crushed
　　C. dashed
　　D. flashed

　　8. A friendship may be _________, casual, situational or deep and lasting.
　　A. identical
　　B. original
　　C. superficial
　　D. critical

　　9. A good newspaper publishes both __________ and foreign news.
　　A. current
　　B. latest
　　C. recent
　　D. domestic

　　10. A good teacher must know how to _________ his ideas.
　　A. convey
　　B. display
　　C. consult
　　D. confront