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. By next year, I shall have ________ all my debts. A. cleared up B. cleared off C. cleaned up D. cleaned away 7. By the end of 1994, 559 kinds of products bad been _________green food, A. named B. restricted C. classified D. labeled 8. By the end of the class, some students had ________ ink. A. finished B. run out of C. ended D. dried up s 9. Cambridge has announced plans to establish a business school _________ the master’s degree in business administration. A. representing B. presenting C. offering D. supplying 10. Can a novelist remain _________ to the problems of the world in which he lives? A. impartial B. indifferent C. careless D. detached