单项选择题

She______ a new idea for increasing sales. It turned out to be a excellent one.

A．followed up
B．kept up with
C．came up with
D．went ahead with

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单项选择题

My boss has always attended to the______ of important business himself.

A．transaction
B．stimulation
C．transition
D．solution

单项选择题

He______ himself totally in his work, till the smell of burnt furnitures spread over the room.

A．concentrated
B．immersed
C．devoured
D．specialized

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