单项选择题

He has established himself to be a competent manager by his successfully handling several difficult tasks.

A．definite
B．effective
C．qualified
D．deficient
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单项选择题
Successful leaders dominate events rather than react to them.
A．control
B．contribute
C．convey
D．contact
单项选择题
The hotel tries to meet the diverse needs of its customers.
A．various
B．indifferent
C．many
D．typical
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