单项选择题

The seminar, ______ by the Nobel Prize winner, probes the problem of wildlife extinction in African countries.

A．convened
B．acquainted
C．incurred
D．hauled
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单项选择题
It's time-consuming to locate the book in the bookcase, because the way he arranges books is quite ______.
A．mighty
B．wholesome
C．undesirable
D．random
单项选择题
They greeted his proposal with ______ and refused to give it serious study.
A．incredulity
B．fickleness
C．derision
D．intensity
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