单项选择题

Linda did not have time to go to the concert last night because she was busy ______ for her experiment.

A．to prepare
B．to be prepared
C．being prepared
D．preparing
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单项选择题
He was stabbed with a bayonet by his enemy.
A．spade
B．rifle
C．dagger
D．spear
单项选择题
An outside adviser has been brought in to ______ the dispute between the management and the union.
A．arbitrate
B．legitimize
C．lug
D．earmark
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