单项选择题

There's no denying that our boss is a businessman who is very ______ and mercenary.

A．keen
B．calculating
C．acute
D．astute
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单项选择题
I am sorry I have no time at present to ______ more detail or give you an account of the incident.
A．bring into
B．talk into
C．come into
D．go into
单项选择题
Mr. Johnson knew that the most trivial chore could prove to be a ______ if approached with enthusiasm.
A．prize
B．reward
C．refund
D．bonus
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