单项选择题

A．$2.6.
B．$3.6.
C．$1.6.
D．$2.8.
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单项选择题
We may infer from the passage that future therapeutic uses of stem cells will be unlikely unless________.
A．human stem cells are used in the research
B．a lot more private donations can be secured
C．more federal money is used for the research
D．talented scientists are involved in the research
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According to the author, to prevent the country from falling back, _________.
A．we must revive morality and the spirit of devotion
B．we should decrease the use of cars
C．we must fight against lawbreaking behavior
D．we should defend our ideals wholeheartedly
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