单项选择题

A ______exercise such as running is helpful to our health.

A．vigorous
B．cautious
C．precious
D．various
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单项选择题
The multinational corporation was making a take-over______ for a property company.
A．application
B．bid
C．proposal
D．suggestion
单项选择题
His argument does not suggest that mankind can______ to be wasteful in the utilization of these resources.
A．resort
B．grant
C．afford
D．entitle
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