A．horses
B．oxen
C．sheep
D．dairy cows
47、 Which animals in this passage are bred by scientific methods?
A．Poultry．
B．Geese．
C．Birds．
D．Chickens．
48、根據(jù)下面內(nèi)容，回答48-67題：
You know that pearls grow inside oysters, but would you ever think to look for diamonds inside an ostrich? Well, a hunter once shot an ostrich and discovered, to his great surprise, that the big bird had swallowed a bunch of diamonds. How could such a strange thing happen?
Like many other birds, the ostrich swallows Small stones that stay inside its " gizzard. " The gizzard is a bird's second stomach. It is where the food is ground up. The small stones help to grind up the food so it can be digested. They do the chewing, because birds don't have teeth. In the case of the ostrich with the diamonds, the bird simply had expensive taste in rocks. He used the diamonds to help digest his dinner.
Diamonds and stones aren't all that an ostrich will swallow. If there are no stones around, it will eat just about anything. Sadly for ostriches in zoos this can be a fatal habit. The tendency to swallow anything it sees has caused the death of many an ostrich. Cruel or careless people often throw things into the bird's living space. They throw keys, coins, even large objects such as horseshoes. The ostrich swallows them without hesitation. Coins can be the worst. Inside the ostrich they wear down to a razor sharp edge. They will cut open the bird's gizzard from the inside. One young zoo ostrich died with 484 coins, weighing more than eight pounds, in its gizzard.
Ostriches eat stones because they don't have________.
A．enough food
B．bird seed
C．teeth
D．diamonds
49、 The ostrich is not smart enough to________.
A．digest its own food
B．eat only diamonds
C．a(chǎn)void eating harmful objects
D．escape from the zoo
50、 The phrase "they do the chewing" makes the rocks seem as though they are________.
A．important
B．a(chǎn)live
C．dangerous
D．uncomfortable
51、 "Fatal" is another word for________.
A．foolish
B．careless
C．deadly
D．cruel
52、根據(jù)下面內(nèi)容，回答52-71題：
Man's story in China began many thousands of years ago.Remains of an early form of man discovered in China, known as Peking Man, indicate that Stone Age men lived in the area as long as 500,000 years ago.During the centuries that followed, their descendants laid the foundations of civilization in China.
Throughout its history, China has been a rich source of inventions. Silk, the compass, tea and porcelain originated there. In addition, they are responsible for the invention of paper and printing.
The Chinese had used ink as early as 1200 B. C., an excellent type which they made from lampblack and which is known in English as India ink or China ink. By the end of the first century A. D., the Chinese had invented paper.
The Chinese also invented printing. Early Chinese printing is called block printing. The printer carved raised characters on a block of wood, wet the surface of the characters with ink, and pressed sheets of paper against them. Printers in the llth century went on to invent movable type of baked clay. The characters of the movable type could be rearranged to form different words and thus be used over and over again. The Chinese alphabet has about 40 thousand characters. Because of the difficulty of producing so many pieces of type, most Chinese printers continued to use block printing.
A good synonym for the underlined word "descendants" in paragraph 1 is__________.
A．foreigners
B．following generations
C．enemies
D．fossilized remains
53、 The name of an earlier form of man found in China is__________.
A．New Stone Man
B．Silk Man
C．Peking Man
D．India Man
54、 Which type of printing is more convenient based on the passage?
A．Movable type.
B．Baked clay.
C．Block printing.
D．Wet ink.
55、 This passage talks mostly about__________.
A．the landforms of China
B．the people of China
C．Chinese explorers
D．Chinese history
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