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Text 3

As West Nile virus creeps toward California, an unlikely warrior could provide the first line of defense: the chicken. The familiar fowl make irresistible targets for mosquitoes. Unlike crows, chickens don’t get sick from West Nile. But they do produce telltale antibodies to the virus. So in test coops scattered across the state, more than 2000" sentinel chickens" submit to frequent blood tests. When antibodies do turn up, California health officials will know that the inevitable has occurred: the West Nile epidemic will have swept the country.
Last week alone, more than 100 new human cases of West Nile were reported. The virus was detected as far west as Colorado and Wyoming, infecting 371 and killing 16 people in 20 states plus the District of Columbia. This year West Nile appeared earlier’ in the mosquito season--mid-June instead of August--and claimed younger victims; the average age dropped from 65 to 54. Feder
A. the abolition of the mosquito-control programs.
B. the surviving mosquito-borne infections.
C. the abuse of some $ 50 million in funds.
D. its failure to conquer mosquito-borne diseases.

[单项选择]Text 4 A pure virus (病毒) could be kept in a bottle, just like hundreds of other chemicals. Yet, when a virus is placed on a living thing, it comes to life. As long as it is on a living material, it grows. A difficult question still remains - what is a virus Is it living or chemical Men of science had always thought life and not-life to be as different as black and white. With the discovery of the virus, they became aware of a grey area that was neither black nor white. Until the 1930’s, it was accepted that there was also a great difference in size between the largest chemical molecules (分子) and the smallest living things. As new and much finer filters (过滤器) were invented, men were able to measure viruses. The first virus to be measured was found to be about 100 millimicrons (毫微米) across. The largest known chemical molecule measures only 22 millimicrons. The smallest living thing measures almost seven times that size or 150 millimicrons. When viruses were measured, they were foun
A. How viruses should be understood.
B. The effect viruses have on living things.
C. How filters are used in studying viruses.
D. The researches scientists do with viruses.

[单项选择]TEXT C A bus took him to the West End, where, among the crazy coloured fountains of illumination, shattering the blue dusk with green and crimson fire, he found the café of his choice, a tea-shop that had gone mad and turned. Bbylonian, a while palace with ten thousand lights. It towered above the other building like a citadel, which indeed it was, the outpost of a new age, perhaps a new civilization, perhaps a new barbarism; and behind the thin marble front were concrete and steel, just as behind the careless profusion of luxury were millions of pence, balanced to the last halfpenny. Somewhere in the background, hidden away, behind the ten thousand llights and acres of white napery and bewildering glittering rows of teapots, behind the thousand waitresses and cash-box girls and black-coated floor managers and temperamental long-haired violinists, behind the mounds of cauldrons of stewed steak, the vanloads of ices, were a few men who went to work juggling with fractions of a farmin
A. modern realistic commercialism existed behind the luxurious appearance.
B. there was a fundamental falseness in the style and the appeal of the café..
C. the architect had made a sensible blend of old and new building materials.
D. the café was based on physical foundations and real economic strength.