单项选择题

The city is an important railroad______ and industrial and convention center.

A．conjunction
B．network
C．junction
D．link
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单项选择题
Many scientists ______the new damage to the forests to be the result of higher levels of pollution.
A．resumed
B．perfumed
C．presumed
D．consumed
单项选择题
This could be the result of laziness or______ which would lose him his customers or his job.
A．integrity
B．denial
C．deduction
D．incompetence
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