Motorways are, no doubt the safest roads in Britain. Mile (41) mile, vehicle for vehicle, you axe much (42) likely to be killed or seriously injured than on an ordinary road. On (43) hand, if you do have a serious accident on a motorway, fatalities are much more likely to (44) than in a comparable accident (45) on the roads.
Motorways have no (46) bends, no roundabouts or traffic lights and (47) speeds are much greater than on other roads. Though the 70 mph limit is (48) in force, it is often treated with the contempt that most drivers have for the 30 mph limit applying in built up areas in Britain. Added to this is the fact that motorway drivers seem to like traveling in groups with perhaps (49) ten meters between each vehicle. The resulting horrific pile-ups (50) one vehicle stops for some reason—mechanical failure, driver error and so on—have become all (51) familiar through pictur
A. push
B. rake
C. till
D. plough
It is often difficult for visitors to understand Americans’ lack of desire for privacy. They are not a nation of walled gardens and closed gates. Their yards normally run into one another without fences；they often visit one another’s homes without being invited or telephoning first; they leave their office doors open while they work.
Their lack of desire for privacy probably results from their history as a nation. America is a big country. There have never been walled cities in the United States, nor was there the need for Americans to protect themselves from neighboring states. During the early years, America had so few settlers that neighbors were very important; they were not to be shut out by doors and fences. Neighbors offered protection and helped in the hard work of settling the land. They depended upon each other.
From the nation’s early history has come the desire for openness rather than privacy. Visitors will notice this desire in a nu
A. they wailed their houses with glass
B. they leave the office doors open while working
C. they never have fence
D. they depended upon each other
In recent years a new farming revolution has begun, one that involves the (21) of life at a fundamental level — the gene. The study of genetics has (22) a new industry called biotechnology. As the name suggests, it (23) biology and modem technology through such techniques as genetic engineering. Some of the new biotech companies specialize (24) agriculture and are working feverishly to duplicate seeds that give a high yield, that (25) diseases, drought and frost, and that reduce the need for (26) chemicals. (27) such goals could be achieved, it would be most beneficial. But some have raised concerns about genetically engineered crops.
In nature, genetic diversity is created within certain space. A rose (28) be crossed with a different kind of rose, but a rose will never cross with a potato. Genetic engineering, (29) , usually involves taking genes from one species and inserting them into (30) in a
A. brake
B. blaze
C. breach
D. brand
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