A. planted
B. was planted
C. were planted
D. will plant
same amount of time, say exercise researchers in Britain. But walks of any length beat sitting at home with your feet up and watching television. They stress. Some researchers in Britain reached these conclusions after putting 56 couch potatoes through an 18 week course of daily walks. They found that longer walks produce the most beneficial changes to the composition of blood fats, but walks of any length improve the fitness of the heart.
In the study, the normally inactive subjects were divided into three roughly equal groups. The "long walker" took a hike of between 20 and 40 minutes every day. "Intermediate walkers" had two rounds of jogging of 10 to 15 minutes, and "short walkers" did three stints of 90 to 110 minutes. The controls sat at home, as usual.
At the start and end of the 18 weeks, the health and fitness of each group were measured and it was found that the long walkers were healthiest, as measured by altered fat profiles in their blood. At the end, each liter of blood from the long walkers contained an average 0.05 grains less apolipoprotein(阿朴脂蛋白) II, a "bad" fat that is linked with heart disease. This was more than twice the drop seen in the intermediate walkers, and five times that in short walkers. In the controls, the level of this fat stayed the same. The drop in apolipoprotein II in the long walker was matched by a rise in the blood level of apolipoprotein I, a "good" fat that is associated with smooth arteries.
1、According to the researchers, ______ is least beneficial to your health.
A、taking a lengthy hike once a day
B、going shopping several times every day
C、doing jogging every morning
D、sitting in the sofa watching TV every evening
2、"Couch potato" in paragraph 2 is used to refer to a kind of ______.
A、farmers
B、vegetables
C、movie-goers
D、TV viewers
3、Which of the following statement is FALSE?()
A、Longer walks benefit our composition of blood fats
B、The subjects in the study all often watch TV
C、Only longer walks benefit our health
D、The subjects in the study may not like exercises
4、The subjects are divided into ______ groups.
A、four
B、three
C、two
D、one
5、Why is long walk beneficial to our heart?()
A、It leads to the drop in apolipoprotein I
B、It leads to the drop in apolipoprotein II
C、It keeps us from watching TV
D、It helps us lose weight
根据下列文章,请回答 21~25 题。
Text 1
In the 1920s demand for American farm products fell, as European countries began to recover from World War I and instituted austerity (紧缩) programs to reduce their imports. The result was a sharp drop in farm prices. This period was more disastrous for farmers than earlier times had been, because farmers were no longer self-sufficient. They were paying for machinery, seed, and fertilizer, and they were also buying consumer goods. The prices of the items farmers bought remained constant, while prices they received for their products fell. These developments were made worse by the Great Depression, which began in 1929 and extended throughout the 1939s.
In 1929, under President Herbert Hoover, the Federal Farm Board was organized. It established the principle of direct interference with supply and demand, and it represented the first national commitment to provide greater economic stability for farmers. President Hoover' s successor attached even more importance to this problem. One of the first measures proposed by President Franklin D. Roosevelt when he took office in 1933 was the Agricultural Adjustment Act, which was subsequently passed by Congress. This law gave the Secretary of Agriculture the power to reduce production through voluntary agreements with farmers who were paid to take their land out of use.A deliberate scarcity of farm, products was planned in an effort to raise prices. This law was declared unconstitutional by the Supreme Court on the grounds that general taxes were being collected to pay one special group of people.However, new laws were passed immediately that achieved the same result of resting soil and providing flood-control measures, but which were based on the principle of soil conservation. The Roosevelt Administration believed that rebuilding the nation' s soil was in the national interest and Was not simply a plan to help farmers at the expense of other citizens. Later the government guaranteed loans to farmers so that they could buy farm machinery, hybrid (杂交)grain, and fertilizers.
第 21 题 What brought about the decline in the demand for American farm products?
A.The impact of the Great Depression.
B.The shrinking of overseas markets.
C.The destruction caused by WWI.
D.The increased exports of European countries.
Many observers wrote about the loneliness and monotony of life on the Plains. Men escaped the oppressiveness by working outdoors and taking occasional trips to sell crops or buy supplies. But women were more isolated, confined by domestic chores to the household, where, as one writer remarked, they were "not much better than slaves. It is a weary, monotonous round of cooking and washing and mending and as a result the insane asylum is 1/3 filled with wives of farmers."
Some say it came from the Indian peoples. When Europeans first came to America they heard hundreds of different Indian languages. Many were will developed.
One tribe especially had a well developed language. This was the Chocktaw tribe. They were farmers and fishermen whole lived in the rich Mississippi valley in what is now the state of Alabama. When problems arose, Chocktaw leaders discussed them with the tribal chief. They sat in a circle and listened to the wisdom of the chief.
He heard the different proposals, often raising and lowering his head in agreement, and saying, "Okeh," meaning "it is so."
The Indian languages have given many words to English. Twenty four of the American States almost half, have Indian names, Okalahoma, the Dakotas, Idaho, Wisconsin, Ohio and Tennessee, to name a few. And the names of many rivers, streams, mountains, cities and towns are Indian.
However, there are many people who dispute the idea that "Okay" came from the In di ans. Some say the President Andrew Jackson first used the word "Okay." Others claim the word was invented by John Jacob Astor, a fur trader of the late 1700s who became one of the world's richest men. Still others say a poor railroad clerk made up this word. His name was Obadiah Kelly and he put his initials(首写字母), O.K. on each package people gave him to ship by train.
So it goes, each story sounds reasonable and official.
But perhaps the most believable explanation is that the word "Okay" was invented by a political organization in the 1800s. Martin Van Buren was running for President. A group of people organized a club to support him. They called their political organization the "Okay Club. The letters "O" and "K" were taken from the name of Van Buren's hometown, the place where he was born, old Kinderhook, New York.
There is one thing about "Okay" that the experts do agree on: that the word is pure American and that it has spread to almost every country on earth.
There is something about the word that appeals to peoples of every language. Yet, here in America it is used mostly in speech, not in serious writing. In recent time, "Okay" has been given an official place in the English language. But it will be a long time before Americans will officially accept two expressions that come from "Okay." There are "Oke" and "Okeydoke".
______different opinions as where the word "Okay" came from are mentioned in the text.
A.Four
B.Five
C.six
D.Three
Today all that has changed. On many modern farms machines now supply 96 percent of the power, human labor 3 percent, and horses 1 percent. Modern farms are enterprising businesses which keep only the livestock that can pay its way. The children go to school by bus every morning, the parents work on the farm or in the house, and hired help is seldom needed. Their work has been replaced by a whole army of farm machines.
Farmers in the machine age also use the new fertilizers, new sprays, new feeds, new hybrid seeds, and other helps developed by farm sciences. As a result the farmers are able to produce more food with less labour. This means fewer but larger farms and fewer but more prosperous farmers.
In old days, most of the work on a farm was done by______.
A.all the farm family
B.livestock
C.farm machines
D.both A and B
A.are
B.were
C.have
D.was