What is the best way you can imagine the overuse of water in our daily life.
|
A．to reduce |
B．reducing |
C．reduced |
D．reduce |
The boy be very naughty, but he is very lovely.
|
A．might |
B．can |
C．may |
D．need |
The good thing about children is that they very easily to the new environments.
|
A．adapt |
B．appeal |
C．attach |
D．apply |
---- Let’s go to cinema.
---- That’ll take your mind off the problem for while.
|
A．the; the |
B．the; a |
C．a; the |
D．a; a |
Although the United States covers so much land and the land produces far more food than the present population needs，its people are by now almost entirely an urban society. Less than a tenth of the people are engaged in agriculture and forestry(林业), and most of the rest live in or around towns，small and large．Here the traditional picture is changing: every small town may still be very like other small towns，and the typical small town may represent a widely accepted view of the country，but most Americans do not live in small towns any more. Half the population now lives in some thirty metropolitan areas(1arge cities with their suburbs, of more than a million people each—a larger proportion than in Germany or England，let alone France). The statistics(统计)of urban and rural population should be treated with caution because so many people who live in areas classified as rural travel by car to work in a nearby town each day. As the rush to live out of town continues，rural areas within reach of towns are gradually filled with houses, so that it is hard to say at what moment a piece of country becomes a suburb. But more and more the typical American lives in a metropolitan rather than a small town environment．
1.If now America has 250 million people．how many of them are engaged in agriculture and forestry?
|
A．About 25 million |
|
B．More than 25 million |
|
C．Less than 25 million |
|
D．Less than 225 million |
2.Which of the following four countries has the smallest proportion of people living in metropolitan areas?
|
A．United States |
B．Germany |
C．France |
D．England |
3.What’s the meaning of the word“metropolitan”in the middle of the passage?
|
A．Of a large city with its suburbs |
B．Of small and large towns |
|
C．Of urban areas |
D．Of rural areas |
Why don’t birds get lost on their long migratory (迁居的) flights? Scientists have puzzled over this question for many years. Now they’re beginning to fill in the blanks.
Not long ago, experiments showed that birds rely on the sun to guide them during daylight hours. But what about birds that fly mainly by night? Tests with artificial stars have proved conclusively that certain night-flying birds are able to follow the stars in their long-distance flights.
One such bird, a warbler(鸣禽) , had spent its lifetime in a cage and had never flown under a natural sky. Yet it showed an inborn ability to use the stars for guidance. The bird’s cage was placed under an artificial star-filled sky at migration time. The bird tried to fly in the same direction as that taken by his outdoor cousins. Any change in the direction of the make-be-live stars caused a change in the direction of his flight. Scientists think that warblers, when flying in daylight, use the sun for guidance. But the stars are apparently their main means of navigation (导航). What do they do when the stars are hidden by clouds? Apparently, they find their way by such landmarks as mountain ranges, coast lines, and river courses. But when it’s too dark to see these, the warblers circle helplessly, unable to get their direction.
1.The reasons why birds don’t get lost on migratory flights__________.
|
A．have been known to scientists for many years |
|
B．are known by everyone |
|
C．have only recently been discovered |
|
D．will probably remain a mystery |
2.Warblers migrate__________.
|
A．from North America to South America |
|
B．using what is apparently an inborn navigational ability |
|
C．only once during their lifetime |
|
D．when they are freed from their cages |
3.When the stars are hidden by clouds, warblers find their way by__________ .
|
A．an artificial star |
B．some landmarks |
|
C．their inborn ability |
D．A and B |
4.This article is a good example of the way scientists__________ .
|
A．discover workable answers to universal questions by studying particular cases(特别案例) |
|
B．jump to conclusions |
|
C．find a law and then investigate（调查） |
|
D．are disappointed by the habits of animals |
