What is the author's attitude toward the future of autos?
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1 .The volcanic eruption can produce a sort of glassy material with sharp edges, which _______.
A will be responsible for more death of respiratory illness worldwide. B will lower the temperature of the earth. C will cause serious air pollution D will lead to people’s heart disease E will cause the movement of homeless people and refugees F will seriously affect the local economy.
2 .One significant improvement in the future car will probably be_____.
A its power source B its driving system C its monitoring system D its seating capacity
3 .What is the author's main concern?
A How to render automobiles pollution-free. B How to make smaller and safer automobiles. C How to solve the problem of traffic jams. D How to develop an automated subway system.
4 .What provides autos with electric power in an automated highway system?
A a rail B an engine C a retractable arm D a computer controller
5 .In an automated highway system, all the drivers need to do is_____.
A keeping in the right lane B waiting to arrive at his destination C keeping in constant touch with the computer center D informing the system of his destination by phone
7 .What was scientists' understanding of methane?
A It was produced from plants. B It was not a greenhouse gas. C It was produced in oxygen-free environments. D It traps more heat than any other greenhouse gas.
8 .To test whether plants are a source of methane, the scientists created_____.
A a oxygen-free environment B an environment with the same concentration of oxygen as the Earth has C a carbon dioxide-free environment D an environment filled with the greenhouse gas
9 .Which statement is true of the methane emissions of plants in the experiment?
A The lower the temperature, the higher the amount of methane emissions. B Living plants release less methane than dried plants at the same temperature. C When exposed to sunlight, plants stop releasing methane. D The higher the temperature, the greater the amount of methane emissions.
10 .Which of the following about methane is not mentioned in the passage?
A Plants growing in soil release methane. B Plants growing in water release methane. C Soil microbes consume methane. D Microbes in plants produce methane.
