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66. Which of the following best states the theme of the passage?

A. Motor car is more and more used in the twentieth century.

B. Motor car has much more advantages than public transport.

C. People can choose to work far away from his house nowadays.

D. Public transport is a big problem in modern society.

67. According to the passage, what enables people to have a greater variety of jobs?

A. His own experience. B. His ability.

C. Possessing a motor car. D. Convenient public transport.

68. Which of the following is NOT the comfort brought by the motor car?

A. Trips to the countryside or seashore.

B. Heating in winter and air conditioning in summer.

C. Greater degree of mobility.

D. Irritation caused by traffic jam.

69. It can be inferred from the passage that _____ .

A. more and more people are able to buy and use a car

B. driving a car to work will save you more time

C. because there are not so many motorways nowadays, many people are still confined

to their neighborhood

D. public transport will be greatly improved since more people will drive a car

70. What does the paragraph preceding this passage probably discuss?

A. The pollution of motor cars. B. The problems of public transport.

C. Serious traffic accident. D. The use of motor car.

Passage Four

Between now and the end of the century, there will be many exciting developments and also many difficult problems to deal with. Perhaps the most urgent problem is to provide enough food. The world’s population is expected to reach 7,000 million to the year 2000, but already scientists have produced new and better varieties of wheat and rice and animal. They have also been experimenting with techniques of cultivating plants by using mixtures of chemical compounds and water only, and then there will be no need for ordinary soil. Another problem which the world will face is to get rid of refuse. One solution is to burn refuse at very high temperature in incinerators. A development of this, which may prove very useful in the future, is to use these incinerators to generate steam power. In fact, any new source of energy will be very welcome, as there is already a shortage of petroleum. To solve the energy problem, scientists will probably also try to make more use of solar energy.

The possible effects of some scientific field, such as lasers and cryogenics, are difficult to imagine and both already have a number of uses. The super-cooling effects of the cryogenics which change liquid helium and other gases into ―superfluids‖ and metals into ―superconductors‖, making them non-resistant to electricity, could change the world in a number of ways. The laser, with its beam of strong light, can drill a hole in a diamond, and yet can be so well controlled that it can be used in delicate eye operations. The question is whether it will be most used for peaceful purposes or as a deadly weapon.

But perhaps the most remarkable developments will occur in space flight. One of the