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A. His artistic taste is superb.
B. His identity remains unclear
C. He was a collector of antiques.
D. He was a rich Italian merchant.
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A. They encourage international cooperation.
B. They lay stress on basic scientific research.
C. They place great emphasis on empirical studies.
D. They favour scientists from its member countries.
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A. Many of them wish to win international recognition.
B. They believe that more hands will make light work.
C. They want to follow closely the international trend.
D. Many of their projects have become complicated.
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A. It requires mathematicians to work independently.
B. It is faced with many unprecedented challenges.
C. It lags behind other disciplines in collaboration.
D. It calls for more research funding to catch up.
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A. Scientists tried to send a balloon to Venus.
B. Scientists discovered water on Venus.
C. Scientists found Venus had atmosphere.
D. Scientists observed Venus from a space vehicle.
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