单项选择题


A．receiver
B．producer
C．taker
D．reliever
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单项选择题
A．second largerB．the second largerC．the second largestD．second largest
A．second larger
B．the second larger
C．the second largest
D．second largest
单项选择题
A．effectiverB．effectiveC．more effectiveD．most effective
A．effectiver
B．effective
C．more effective
D．most effective
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