单项选择题

The mechanisms ( at )work (are manifest) in the tendency for such physical activity( to )utilize the (potential) harmful constituents of the stress response.

A．at
B．are manifest
C．to
D．potential
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单项选择题
It is announced that a wallet has been found and can be __________ at the manager's office.
A．declared
B．obtained
C．reclaimed
D．recognized
单项选择题
Talk to anyone in the drug industry, ___________ you'll soon discover that the science of genetics is the biggest thing to hit drug research since penicillin was discovered.
A．or
B．and
C．for
D．so
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