VI. Read the text and questions below. For each question, circle the letter you choose A, B, C or D.
The agricultural revolution in the 19th century involved two things: the invention of labour-saving machinery and the development of scientific agriculture. Labour-saving machinery naturally appeared first where labour was scarce. "In Europe," said Thomas Jefferson, "the object is to make the most of their land, labour being abundant; here it is to make the most of our labour, land being abundant." It was in the United States, therefore, that the great advances in 19th century agricultural machinery first came.
At the opening of the century, with the exception of a crude plough, farmers could have carried practically all of the existing agricultural implements on their back; by 1860, most of the machinery in use today had been designed in an early form. The most important of the early inventions was the iron plough. As early as 1790 Charles Newbold of New Jersey had been working on the idea of a cast-iron plough and spent his entire fortune in introducing his invention. The farmers, however, were not interested in it, claiming that the iron poisoned the soil and made the weeds grow. Nevertheless, many people devoted their attention to the plough, until in 1869 James Oliver of Indiana turned out the first chilled-steel plough.
According to the passage, which of the following statements about Charles Newbold is true?
A.He was James Oliver's assistant.
B.He was born in Europe.
C.He was opposed to scientific agriculture.
D.He spent his own money to promote his invention.

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VI. Read the text and questions below. For each question, circle the letter you choose A, B, C or D.
The agricultural revolution in the 19th century involved two things: the invention of labour-saving machinery and the development of scientific agriculture. Labour-saving machinery naturally appeared first where labour was scarce. "In Europe," said Thomas Jefferson, "the object is to make the most of their land, labour being abundant; here it is to make the most of our labour, land being abundant." It was in the United States, therefore, that the great advances in 19th century agricultural machinery first came.
At the opening of the century, with the exception of a crude plough, farmers could have carried practically all of the existing agricultural implements on their back; by 1860, most of the machinery in use today had been designed in an early form. The most important of the early inventions was the iron plough. As early as 1790 Charles Newbold of New Jersey had been working on the idea of a cast-iron plough and spent his entire fortune in introducing his invention. The farmers, however, were not interested in it, claiming that the iron poisoned the soil and made the weeds grow. Nevertheless, many people devoted their attention to the plough, until in 1869 James Oliver of Indiana turned out the first chilled-steel plough.
Why did farmers reject Newbold's plough?
A.Their horses were frightened by it.
B.They preferred lighter tools.
C.It was too expensive.
D.They thought it would ruin the land.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
Although they are an inexpensive supplier of vitamins, minerals, and high quality protein, eggs also contain a high level of blood cholesterol, one of the major causes of heart disease. One egg yolk, in fact, contains a little more than two-thirds of the suggested daily cholesterol limit. This knowledge has caused egg sales to plummet in recent years, which in turns has brought about the development of several alternatives to eating regular eggs. One alternative is to eat substitute eggs.
These egg substitutes are not really eggs, but they look somewhat like eggs when they are cooked. They have the advantage of having lower cholesterol rates, and they can be scrambled or used in baking. One disadvantage, however, is that they are not good for frying, poaching, or boiling. A second alternative to regular eggs is a new type of egg, sometimes called “designer” eggs. These eggs are produced by hens that are fed low-fat diets consisting of ingredients such as canola oil, flax, and rice bran. In spite of their diets, however, these hens produce eggs that contain the same amount of cholesterol as regular eggs. Yet, the producers of these eggs claim that eating their eggs will not raise the blood cholesterol in humans.
Eggs producers claim that their product has been portrayed unfairly. They cite scientific studies to back up their claim. And, in fact, studies on the relationship between eggs and human cholesterol levels have brought mixed results. It may be that it is not the type of egg that is the main determinant of cholesterol but the person who is eating the eggs. Some people may be more sensitive to cholesterol derived from food than other people. In fact, there is evidence that certain dietary fats stimulate the body’s production of blood cholesterol. Consequently, while it still makes sense to limit one’s intake of eggs, even designer eggs, it seems that doing this without regulating 30 dietary fat will probably not help reduce the blood cholesterol level.
What is meant by the phrase “mixed results”?
A.The results are blended.
B.The results are a composite of things.
C.The results are mingled together.
D.The results are inconclusive.