The principal ______ a diploma to each of the graduates.

 go on with our cause.A. principle     B. principal     C. primarily     D. chiefly

A.principle

B.principal

C.pricipled

D.pricipality

A.major

B.reformed

C.main

D.predominant

A.principal

B.substantial

C.prosperous

D.generous

A.It , its

B.She , her

C.He , his

D.She , its

A.① ② ③ ④ ⑤ ⑥

B.① ③ ④ ⑤ ⑥

C.② ④ ⑤ ⑥

D.② ④ ⑥ ⑤

A.主要研究者是Principal Investigator简称PI

B.PI为药物临床试验项目的第一负责人

C.PI负责团队参与研究者履历真实性、对受试者的诊治与安全负责，对试验资料的真实性负责

D.其余选项都对

lization. The principal activity is still sheep-farming, as it has been for a thousand years, and many ancient words like "fell" for "hill" and "tam" for "lake" are still in daily use. In spite of its heavy rainfall and relative inaccessibility, its special atmosphere and spectacular natural beauty combine to make this one of England's favourite holiday areas at all seasons of the year. But at Christmas 1968, still gripped by the fear that foot-and-mouth disease could spread to the hill flocks and sweep like wildfire right up to the Scottish border, it was quieter than ever before in this century. Luckily not a single farm had caught tile infection, the nearest case having been an isolated one at Kendal several weeks before. But every Lakeland farmer knows that one case among the unfenced hill flocks on the fells could lead to complete annihilation of hundreds of thousands of sheep and the virtual end of the district's principal industry; you cannot replace sheep, acclimatized to their own part of the fell for generations, in the same way that you can replace cattle in a field.

Nobody could remember a Christmas like it, especially Boxing Dab, which is traditionally one of the big outdoor holidays of the Lakeland year. Normally this is a day spent following the mountain packs of hounds, fell-walking and, if the weather is propitious, skiing and skating, but this time there were none of these things. Visitors were actively discouraged, and those who did come were asked not to go on the fells, footpaths or bridleways or near farmland, while motorists were requested not to drive on minor roads and to shun the smaller valleys. The enterprising hotels which had earlier in the year decided to keep open during the winter were by the end of October having a desperate time. Hundreds of bookings had been cancelled and scores of dinner parties and young farmers' reunions eliminated. All youth hostels were closed. At least one climbing club, unable to climb, substituted a training programme of films and simulated climbs on the more substantial municipal buildings.

The weather in the area was dry, crisp, windless and cold, in fact ideal for brisk outdoor activities. But nobody was able to enjoy it. Everything was stopped: hunting, walking, climbing, skiing, motor cycle trials, sporting events of every description. All the seasonal dances, festivals, conferences, shepherds' meets and a hundred and one, other social occasions abandoned. The ice was bearing on some of the lakes but you could not go skating there. Meanwhile the foxes, emboldened by an unprecedented freedom from harassment, were stalking closer to the farms and the flocks of Christmas turkeys, while the hounds sulked miserably in their kennels.

Farmers are apt to criticize some sections of the outdoor fraternity for their occasional thoughtless behaviour, but the way that walkers, climbers, skiers, fishermen, hunters and the rest went out of their way to help them at this time should never be forgotten. The general public, locals and visitors alike, tried to give the fell farmers a sporting chance, and this remarkable display of public spirit was the one bright note in a very sad time.

The word "this" in line 5 refers to______.

A．its special atmosphere

B．the Industrial Revolution

C．the spectacular natural beauty

D．the Lake District

31. Which of the following statements is true according to the passage？ ()

A. AIDS is a disease for which a cure has been found.

B. AIDS is a disease which has just been found.

c. AIDS is a disease which has existed for a long time.

D. AIDS is a disease which spreads very slowly.

32. Who is easily infected with AIDS？ ()

A. People who use drugs.

B. People who visit prostitutes.

C. Patients who stay in hospital.

D. All of the above.

33. In WHO' s opinion, what will help most effectively in fighting against the spread of AIDS？ ()

A. More education.

B. More medicines.

C. More doctors.

D. More equipment.

34. From the passage , we can see that the writer is not happy about ().

A. the education the general public get on AIDS

B. the education the medical staff get on AIDS

C. the TV programmes on AIDS

D. the newspaper articles on AIDS

35. Which of the following statements is NOT true according to the passage？ ()

A. It is not enough only to educate the general pubic.

B. There are some hospitals in some parts of the world which do not accept AIDS patients.

C. Great care has been taken to prevent the spread of AIDS everywhere in the world now.

D. More money and resources are needed to control the spread of AIDS