大学英语四级题库_大学英语题库

填空题

参考答案：O

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1.单项选择题Questions 11 to 18 are based on the conversation you have just heard.

A．Families with cars.
B．Americans’ heavy dependence on cars.
C．Roads and highways.
D．Traffic problems in America.

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2.填空题

参考答案：H

3.填空题

参考答案：F

4.填空题Technological invention has directly or indirectly produced social change in every period of history. The invention of the horse collar in the Middle Ages was a (36) technological advance for agriculture; the (37) for use at sea so (38) navigation in the fifteenth century that it led in the age of (39) ; and the steam engine was an (40) factor in the industrialization of Europe in the nineteenth century. A discovery is another kind of technological (41) . While inventions add something new to a culture, discoveries increase our knowledge of something that already exists. Gravity had always been there, but Newton "discovered" it: be (42) how this natural force worked and how its laws (43) to falling bodies. This knowledge made possible many new inventions. (44) . Since each invention makes more inventions possible, the speed of technological development tends to accelerate. Benjamin Franklin experimented with electricity in the eighteenth century, (45) . In the hundred years since Edison invented the light bulb, the discovery of electricity has led to tens of thousands of inventions, from the internal burning engine to the computer. (46) pose some of tile greatest challenges of our time.

参考答案：exploration

5.填空题

参考答案：A

6.填空题

参考答案：D

7.单项选择题

A．In 1946.
B．In 1957.
C．In 1959.
D．In 1960.

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8.单项选择题Questions 11 to 18 are based on the conversation you have just heard.

A．He prefers to see a reporter this afternoon.
B．He has to read the report first.
C．He is ready to help the woman.
D．He can’t help the woman at present.

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9.单项选择题

A．To boost book sales.
B．To encourage publishers to publish e-books.
C．To advertise their machine.
D．In order to advertise their software.

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10.单项选择题Questions 11 to 18 are based on the conversation you have just heard.

A．He is optimistic about final cures.
B．He is confident that will help.
C．He is doubtful that it helps.
D．He is pessimistic about modem medicine.

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