[单项选择]The artist wanted to pay the farmer, but the farmer wanted one of his pictures instead of money.


A. Right.
B. Wrong.
C. Doesn’t say.

[单项选择]The artist thought the farmer wanted a picture of his because the farmer wanted to give it to his son as a present


A. Right.
B. Wrong.
C. Doesn’t say.

[单项选择]At last the artist wanted to give ______ to the farmer.

[单项选择]The farmer’s son wanted ______ an artist.

[单项选择]I wanted to pay for the coffee, but I found that all Ihad was a couple of __________ coins.
A. worthless
B. priceless
C. invaluable
D. inexpensive

[单项选择]The farmer wanted ______ picture.

[单项选择]Every day, the artist went out to help the farmer to do some farming.


A. Right.
B. Wrong.
C. Doesn’t say.

[单项选择]He had wanted a 25% raise in pay, but after talking to his boss, he decided that a 5%raise would have to （）
A. suffice
B. satisfy
C. gratify
D. delight

[单项选择]After hearing the farmer’s words the artist felt very angry.


A. Right.
B. Wrong.
C. Doesn’t say.

[单项选择]In spite of the efforts of those industrious farmers, the local economy is far from developed due to isolation.（　）
A. capable
B. ingenious
C. innovative
D. hard-working

[单项选择]
For hundreds of years, farmers have selected and bred plants and animals to favor, or bring out, characteristics they desired. For example, cows that produced large amounts of milk were selected for breeding, while poor milk producers were not allowed to reproduce. In like manner, horses were bred for speed and strength. Those having these desired characteristics were selected for breeding. Over time, these preferred breeds became more common than earlier, less desired types. This selective breeding is called artificial selection.
In this passage, Camp and Arms explain how this same process occurs naturally. The theory of evolution by natural selection was put forward in a joint presentation of the views of Charles Darwin and Alfred Russell Wallace before the Linnaean Society of London in 1858. Darwin and Wallace were not the first to suggest that evolution occurred; but their names are linked with the idea o
A. control the direction of artificial selection
B. control the direction of natural selection
C. make new genes in artificial selection
D. make new genes in natural selection

[填空题]The farmer told the picnickers to leave because he was unfriendly and fault -finding.

[单项选择]The farmer can continue to support himself and his family only if he produces a surplus.（）
A. 只要农民生产有剩余，就能养活自己和家人。
B. 只有生产更多的农作物，农民才能养活自己和家人。
C. 只有当拥有盈余时，农民才能持续地供养自己和家人。
D. 农民生产有剩余，只有这样，他才能养活自己和家人。

[填空题]What treatment did the new doctor give the farmer
The new doctor gave the farmer （） since he knew the farmer was lying to him.

[单项选择]

About 150 years ago the children of a poor farmer who lived in South Africa found a pretty pebble (鹅卵石) on the bank of a river. The pebble shone brightly in spots. The children took the pebble home and showed it to their mother. Then they tossed (扔) it aside. The next day a neighbour saw it and offered to buy it. The children and the mother told him that he could have it for nothing. Who ever heard of selling a pebble
The pebble turned out to be a large diamond. No one had known that there are diamonds in South Africa. Today a large part of all the diamonds in the world come from a region not far from the place where the children found their bright pebble.
Diamonds are crystals of carbon. Carbon is a very common material. Coal, for example, is made up mostly of carbon. But the carbon of coal is not in crystal form. Clear crystals of carbon are very rare.
The word "diamond" comes from a Greek word meaning "the unconquerable". The diamond
A. physical properties
B. brightness
C. chemical composition
D. appearance