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far more numerous
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单项选择题
In the US,there is a long waiting list for organs because ______.
A．there is a shortage of actual organs
B．only a few people become organ donors
C．doctors have set a limit to the number of organ recipients
D．transplant surgery is still experimental
单项选择题
A．of theseB．of thatC．of a personD．of those
A．of these
B．of that
C．of a person
D．of those
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