单项选择题

He left early on the ______ that he had a had toothache and had to see the dentist.

A．context
B．contest
C．pretext
D．prey
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单项选择题
Some studies confirmed that this kind of eye disease was ______ in tropical countries.
A．prospective
B．prevalent
C．provocative
D．perpetual
单项选择题
The problems requiring immediate solution will be given ______ at the meeting.
A．priority
B．urgency
C．superiority
D．emergency
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