单项选择题

A．Progress in medicine.
B．Progress in new materials.
C．Progress in computers.
D．Progress in helicopters.
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单项选择题
A．They make him feel good.B．They make no impact on him.C．They bore him.D．They make him angry.
A．They make him feel good.
B．They make no impact on him.
C．They bore him.
D．They make him angry.
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