单项选择题

A．Both Sarah and Tom have been awarded doctoral degrees.
B．Tom has arranged to meet his bride Sarah in Hawaii.
C．Tom was more excited than Sarah at the wedding.
D．A double blessing has descended upon Tom.
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单项选择题
Safety studies have been done on GM salmon.
A．Y
B．N
C．NG
单项选择题
On the basis of their models, scientists are of the opinion that______.
A．the climate of the world should be becoming cooler
B．the new Ice Age will be delayed by the greenhouse effect
C．the man-made warming effect helps to increase the solar effects
D．it will take thousands of years for the inertia of the earth’’s climate to take effect
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