单项选择题

It is hard to ensure that people doing ______ jobs receive equivalent rates of pay.

A．comparative
B．comparable
C．relative
D．equal
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单项选择题
The subject is not included in the ______,so I must give you some additional lessons.
A．currency
B．curriculum
C．circuit
D．circumstance
单项选择题
You shouldn't carry a large ______ of books because the train is very crowded.
A．pack
B．parcel
C．package
D．packet
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