题目内容
（请给出正确答案）
Classification is a useful ______ to the organization of knowledge in any field.
A．means
B．approach
C．mode
D．manner
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[A] dull
[B] tedious
[C] tiresome
[D] monotonous
[A] They did not have up-to-date ideas.
[B] They were unintelligent.
[C] They did not have much freedom.
[D] They had no physical activity.
[A] since he was born.
[B] since he graduated from college.
[C] since his wife died.
[D] almost half his life.
[A] Lack of navigation equipment.
[B] Severe winter in Patagonia.
[C] The death of Magellan.
[D] Dangers from rocks and storms.
Now, listen. to the passage.
In 1847 most countries of the world were
[A] not yet using postage stamps.
[B] collecting valuable stamps.
[C] buying stamps from Mauritius.
[D] printing their own stamps.
[A] Because she does not get along with her brother.
[B] Because her parents treat her badly.
[C] Because she wants to be independent.
[D] Because she quarreled with her parents.
[A] Senior citizens are more likely to contract AIDS compared with young people.
[B] Many AIDS victims suffer not only physically, but also emotionally and psychologically.
[C] People will refuse donated blood in the future because it is likely to contain AIDS virus.
[D] Doctors have lost their hope to see an eventual cure for the AIDS patients.
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