完型填空

　　Part Ⅳ CLOZE ［15 MIN.］

　　Decide which of the choices given below would best complete the passage if inserted in the corresponding blanks. Mark the best choice for each blank on your answer sheet.
　　
　　The difference between a liquid and a gas is obvious ( 26 ) the conditions of temperature and pressure commonly found at the sur face of the Earth. A liquid can be kept in an open container and ( 27 ) it to the level of a free surface. A gas forms no free surface but ( 28 ) to diffuse throughout the space available; it must  ( 29 ) be kept in a closed container, as ( 30 )a planet's atmosphere. The distinction was a prominent feature of early theories ( 31 )the phases of matter. In the nineteenth century, for example, one theory maintained that a liquid could be "dissolved" in a vapor without losing its identity, and another theory held that the two phases are ( 32 ) different kinds o f molecules(分子). The theories now prevailing ( 33 ) a quit e different approach by emphasizing what liquids and gases have in common. They are both forms of matter that have no permanent structure, and they both flow ea sily. They are fluids. 

　　The ( 34 ) similarly of liquids and gases becomes clear ly apparent when the temperature and pressure are raised somewhat.( 35 ) a closed container partially filled with a liquid is heated. The li quid expands or ( 36 ), becomes less dense; some of it evapor ates.( 37 ), the vapor above the liquid surface becomes dense r as the evaporated molecules are added to it. The combination of temperature an d pressure ( 38 ) the densities become equal is ( 3 9 ) the critical point. Above the critical point the liquid and the gas can no longer be ( 40 ); there is a single, undifferentiated fluid phase of uniform density.

　　26. A. in B. on C. under D. beyond 
　　27. A. fills B. be filled  C. filling D. to fill 
　　28. A. intends B. tends  C. inclines D. contends 
　　29. A. however B. nevertheless  C. so D. therefore 
　　30． A. in the event of B. in the case of C. with a view to D. with reference to 
　　31. A. having described B. described C. describing D. to have described 
　　32. A. made up of B. consisted of C. constituted of D. made from 
　　33. A. apply B. adapt C. take D. conduct 
　　34. A. elementary B. crucial  C. rudimentary D. fundamental 
　　35. A. Suppose B. To suppose  C. Being supposed D. Supposed 
　　36. A. in a word B. in the meantime C. in other words D. in that case 
　　37. A. Similarly B. In contrast  C. Furthermore D. Instead 
　　38. A. on that B. on which  C. at that D. at which 
　　39. A. known B. defined  C. called D. referred to 
　　40. A. classified B. recognized  C. categorized D. distinguished

　　选择

　　Part Ⅴ GRAMMAR AND VOCABULARY ［15 MIN.］

　　There are twenty-five sentences in this section. Beneath each sentence there are four words or phrases marked A, B, C and D. Choose one word or phrase that best completes the sentence. Mark your answers on your answer sheet.

　　41. Acute hearing helps most animals sense the approach of thunderstorm s long before people___.

　　A. do B. hear C. do them D. hearing it 

　　42. This is an illness that can result in total blindness ___ left u ntreated.

　　A. after B. if C. since 

　　43. The central provinces have floods in some years, and ___.

　　A. drought in others B. droughts are others C. while other droughts D. others in drought 

　　44. Do help yourself to some fruit,___ you?

　　A. can't B. don't C. wouldn't D. won't 

　　45. There___ nothing more for discussion, the meeting came to an e nd half an hour earlier.

　　A. to be B. to have been C. being D. be

　　46. My mother can't get ___ because she has rheumatism (风湿病). 

　　A. about C. through D. in

　　47. I was very much put ___ by Mark's rude behavior; it really annoy ed me.

　　 

　　48. You ___ Jim anything about it. It was none of his business.
　　A. needn't have told B. needn't tell  C. mustn't have told D. mustn't tell 

　　49. All of us would have enjoyed the party much more if there___ q uite such a crowd of people there.

　　A. weren't B. hasn't been C. hadn't been D. w ouldn't be 

　　50. Firms that use computers have found that the number of staff ___ quality control can be substantially reduced.

　　 

　　51. ___ at in this way, the present economic situation doesn't seem so gloomy.

　　A. Looking B. Looked C. Having looked D. To look 

　　52. Many people are ___ to insect bites, and some even have to go to hospital.

　　A. insensitive B. allergic C. sensible D. infected 

　　53. When you're driving on a motorway, you must obey the signs telling you to get into the right ___.

　　 

　　54. The motorist had to ___to avoid knocking the old woman down in the middle of the road.

　　A. swerve B. twist C. depart D. swing 

　　55. In winter drivers have trouble stopping their cars from ___ on icy roads.

　　A. skating B. skidding C. sliding D. slipping 

　　56. This project would ___ a huge increase in defense spending.

　　A. result B. assure C. entail D. accomplish 

　　57. The chances of a repetition of these unfortunate events are ___ indeed.

　　A. distant B. slim C. unlikely D. narrow 

　　58. We should make a clear ___ between 'competent' and 'proficient' for the purposes of our discussion.

　　A. separation B. division C. distinction D. diffe rence 

　　59. In the present economic ___ we can make even greater progress than previously.

　　A. air B. mood C. area D. climate 

　　60. Rite of Passage is a good novel by any standards;___, it shoul d rank high on any list of science fiction.

　　A. consistently B. consequently C. invariably D. fortunately 

　　61. The diversity of tropical plants in the region represents a seeming ly___ source of raw materials, of which only a few have been utilized.

　　A. exploited B. controversial C. inexhaustible D. remarkable 

　　62. While he was in Beijing, he spent all his time ___ some import ant museums and buildings.

　　A. visiting B. traveling C. watching D. touring 

　　63. You must let me have the annual report without ___ by ten o'cl ock tomorrow morning.

　　A. failure B. hesitation C. trouble D. fail

　　64. As the director can't come to the reception, I'm representing the c ompany

　　A. on his account B. on his behalf  C. for his part D. in his interest 

　　65. Dreams are___ in themselves, but when combined with other data, they can tell us much about the dreamer.

　　A. uninformative B. startling C. harmless D. uncontrollable