单项选择题

Employees in chemical factories are entitled to receive extra pay for doing hazardous work.

A．poisonous
B．difficult
C．dangerous
D．harmful
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单项选择题
Teachers and nurses who deal with children are obliged to report cases of suspected child abuse to authorities.
A．reminded
B．expected
C．compelled
D．requested
单项选择题
We suspect there is a quite deliberate attempt to sabotage the elections and undermine the electoral commission.
A．conscious
B．desperate
C．clumsy
D．intentional
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