单项选择题

The patient is not in good condition, so do not ______ your visit.

A．lengthen
B．delay
C．extend
D．prolong
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单项选择题
He is a very ______ character; he is never relaxed with strangers.
A．self-confident
B．self-conscious
C．self-evident
D．self-serving
单项选择题
If you want to go to the concert, you'll have to make a ______, or there will be no tickets.
A．reservation
B．punctuality
C．compliment
D．clarity
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