单项选择题

They went__________the schedule for the conference again and again until they felt satisfied with every detail of it.

A．out
B．up
C．over
D．by
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___Hongkong, is often regarded as____international Centre for business, finance and tourism.
A．/; an
B．An; /
C．The; /
D．/; the
单项选择题
John left home twenty minutes ago. It is usually half an hour's drive from his home to theoffice here. So he__________soon.
A．should have arrived
B． need arrive
C．must have arrived
D．may arrive
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