47. In Disneyland every year, some 800,000 plants are replaced because Disney refused to ________ signs asking his “guests” not to step on them.
A. put down B. put out C. put up D. put off 【参考答案】：C
48. ________ difficulties we may come across, we’ll help one another to overcome them.
A. Wherever B. Whatever C. However D. Whenever 【参考答案】：B
49. And doing all of that took time and patience, and most of all, it took ________.
A. determination B. standing C. duration D. persistence 【参考答案】：D
50. They agreed to ________ the conference to deal with the problem.
A. push for B. push in C. press for D. press in
【参考答案】：C
第三单元
1. He is very ____ and well-qualified, so he should reach the top of his profession.
A) ambitious B) urgent C) proud D) jealous 【参考答案】：A
2. China has been following the foreign policy to develop relations with other countries on the ____ of the five principles of peaceful co-existence. A) ground B) foundation C) basis D) bases 【参考答案】：C
3. We have had to raise our prices because of the increase in the cost of ____ materials.
A) crude B) natural C) raw D) original 【参考答案】：C
4. Today, housework has been made much easier by electrical ____.
A) facilities B) apparatus C) equipment D) appliances 【参考答案】：D
5. Although some students graduate from high school, they are virtually illiterate ____ writing a business letter.
A) in the event of B) in terms of C) in the light of D) in case of 【参考答案】：B
6. As no two speakers of a language speak ____, differences will be found in the pronunciations of the speakers. A) ideally B) alike C) likely D) similarly 【参考答案】：B
7. Cross-country bicycle racing, ____ early in the 20th century in France, became prominent in the 1950s.
A) generated B) sponsored C) proclaimed D) originated 【参考答案】：D
8. Researchers ____ that genes may determine the strength of the immune system, which could help explain how an infectious disease could have a hereditary link. A) speculate B) estimate C) evaluate D) anticipate 【参考答案】：A
9. As an industry, biotechnology is most likely to ____ electronics in dollar volume and perhaps surpass it in social impact by 2020.
A) compete B) contest C) rival D) strive 【参考答案】：C
10. The patient has been ____ of the safety of the operation.
A) assured B) guaranteed C) entrusted D) confirmed 【参考答案】：A
11. According to the weather forecast, which is usually ____, it will rain this afternoon.
A) accurate B) definite C) exact D) perfect 【参考答案】：A
12. In a typhoon, winds ____ a speed greater than 120 kilometers per hour.
A) assume B) attain C) assemble D) accomplish 【参考答案】：B
13. If the physical, psychological and environmental demands on workers ____ their capabilities, hazards arise. A) precede B) succeed C) proceed D) exceed 【参考答案】：D
14. In some child-centered families, the children often make ____ demands upon their parents’ money and time. A) exceeding B) extensive C) exclusive D) excessive 【参考答案】：D
15. During an earthquake, the great part of damage and loss of life has been ____ collapse of buildings and the effect of rockslides, floods, fire, diseases, and other phenomena
resulting from earthquakes, rather than from the quakes themselves.
A) due to B) contributing to C) by reason of D) on account of 【参考答案】：A
16. The difficult financial situation in the US threatened to undermine the _____of the Presidency.
A) institution B) monument C) consequence D) inspection 【参考答案】：A
17. Moore _____ $100,000 to the orchestra at the fund-raising dinner.
A) beat B) instituted C) pledged D) evaporated 【参考答案】：C
18. Florida was a key state in his ______ for re-election. A) advertisement B) campaign C) mass media D) intonation 【参考答案】：B
19. That staff member’s performance is so good that I have decided to give him some _____ suits as prizes, which would come in handy for a salesman.