单项选择题

China started its space industry only in recent years, and should _______ no lime in catching up.

A．delay
B．lag
C．lessen
D．lose
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单项选择题
From the top of the building, we can see the bridge _______ construction.
A．by
B．in
C．under
D．below
单项选择题
The boss of the company has always attended to the _______ of important business himself.
A．transaction
B．stimulation
C．transition
D．solution
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