1、 By saying“mey had struck scientific gold”(Lines 1-2,Paragraph 4),the author means that (单选题)
A. their discovery earned them great fame.
B. their findings enjoyed enormous market value.
C. they acquired valuable resources for their studies.
D. they had made a significant discovery in their research.
试题答案:D
2、 (单选题)
A. research
B. operation
C. movement
D. search
试题答案:D
3、 (单选题)
A. on
B. ill
C. among
D. along
试题答案:A
4、 What does the text mainly discuss? (单选题)
A. Threats from the new microbes in the next century.
B. How new viruses affect the human society.
C. What megacities may bring to human species.
D. The disastrous effect of nuclear and biological weapons.
试题答案:A
5、 (单选题)
A. therefore
B. nevertheless
C. anyway
D. moreover
试题答案:B
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