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(B)
Air East Flight NO. Date Allowance
From: Hong Kong AE172 20Dec 30kg
To: Tokyo AE382 28Dec 30kg
To: Hong Kong AE390
Ticket valid (有效的) for 1 year from date of issue.
Conditions:
(1) The company will do its best to carry the passenger and luggage at the times advertised.
Timetables may, however, change suddenly and flights be cancelled.
(2) Passengers who arrive late and miss their flights will have to buy new tickets.
(3) Any damage to luggage must be reported in writing within seven days.
(4) If passengers carry more luggage than they are allowed, they must pay extra.
(5) Passengers must have with them all the necessary official papers.
(6) Passengers must pay their own airport tax.
(7) Passengers may carry a small bag with them on to the plane. It must not weigh more than 7kg.
It must be put in an overhead locker or on the floor under the seat in front of the passenger.
(8) Passengers may not carry any sharp objects on to the aeroplane.
(9) Dangerous objects may not be put in luggage. Acids, things which catch fire easily and poisons
are not allowed.
(10) Passengers must do as the captain orders them.
(11) No smoking is allowed anywhere on the aeroplane.
(12) Mobile phones and similar pieces of equipment must be switched off.
70. Which of these actions is not against the conditions?
A. Forgetting your passport. B. Smoking in the toilets.
C. Carrying a mobile phone. D. Having a pair of scissors in your hand luggage.
71. According to the passage, which statement is NOT TRUE?
A. You can change the dates of travel during a twelve-month period.
B. The airline must accept responsibility if a flight does not happen.
C. The cost of the ticket does not include airport tax.
D. The captain has full authority on his plane.
72. How much luggage may the passenger take free of charge on this ticket?
A. 30 kg. B. 37 kg.
C. 60 kg. D. 67 kg.
(C)
Scientists have long believed one way to stop the Earth’s atmosphere from warming is by planting more trees. The idea is that more trees will take in or absorb some of the carbon dioxide in the atmosphere. Carbon dioxide is a gas released by cars, factories and other human activities. The gas traps heat in the Earth’s atmosphere, which warms the planet. However, two new studies have found that trees may not be as helpful in reducing carbon dioxide as thought.
The first study was done at Duke University in Durham, North Carolina. Researchers pumped extra carbon dioxide into a test area where pine trees were growing. The trees grew thirty-four percent faster during the first three years. However, in time, the trees slowed to about their normal growth rate. The scientists say this is because trees need other nutrients, such as nitrogen.?
In the second study, researchers from Duke and Bowdoin College in Brunswick, Maine examined the soil around trees. They discovered that as the leaves broke down into the soil, all the carbon was not trapped in the soil. Much of it was released into the atmosphere as carbon dioxide.?
The findings of the two studies were published last month in Nature magazine. They suggest there is limited value in planting trees to reduce the carbon dioxide pollution in the atmosphere.?
Forest planting has been a part of negotiations on a world agreement to reduce greenhouse gases that scientists believe cause global warming. The United States, Canada, Japan and some other industrial countries have supported the idea. But this new research suggests the idea is not as effective as environmental activists had thought. Scientist Ram Oren of Duke University led the study on tree growth. He says that earlier estimates on the ability of forests to absorb carbon dioxide were overly hopeful.?
Some scientists not involved in the studies say the research provides some of the first evidence on how trees react to carbon dioxide. Other scientists say the research disputes a belief among some coal and power companies. The companies say that more carbon dioxide in the atmosphere will not create harmful global warming. Instead, they say it will increase forests and other plants.
73. What is the purpose of this passage?
A. Introduce some new ideas about the relationship between trees and carbon dioxide.
B. Introduce recent condition of global industrial pollution.
C. Call on people to plant more trees to reduce greenhouse gases.
D. Point out that power companies should be responsible for the rising levels of carbon dioxide.
74. Why did the researchers put trees in extra carbon dioxide in the first study?
A. To learn whether trees can still absorb carbon dioxide under extreme conditions.
B. To get more oxygen from these trees.
C. To evaluate the maximum carbon dioxide that trees can absorb.
D. To see the effect of carbon dioxide on the growth rate of these trees.
75. What happened to the leaves falling from the trees in the second study?
A. They broke down and the main parts turned into oxygen.
B. They broke down and the carbon content had mainly turned into carbon dioxide.
C. They broke down and the carbon content was mainly absorbed in the soil.
D. They absorbed more carbon dioxide.
76. Scientist Ram Oren thinks that common beliefs of the tree’s ability to absorb carbon dioxide are ____________.
A. appropriate B. pessimistic C. over-optimistic D. convincing
77. The word “dispute” (Line 2, Para.6) probably refers to ____________.
A. question B. support C. maintain D. accept
