单项选择题

A．Right now.
B．In the physics class.
C．After the class.
D．In the afternoon.
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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
单项选择题
The author ends the passage with the implication that ___________.
A．compensation benefits in America are soaring to new heights
B．the workers are not the only ones to benefit from the compensation system
C．people from all walks of life can benefit from the compensation system
D．money floating in the compensation system is a huge, drain on the U.S. economy
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