单项选择题

Many airlines will offer substantial discounts in an effort to remain ______ during the tourist season.

A．sophisticated
B．competitive
C．considerate
D．superficial
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单项选择题
Wimbledon is widely ______ as being the premier tennis tournament.
A．dignified
B．acknowledged
C．clarified
D．illustrated
单项选择题
Another sleepless night finally put an end to the demanding work, so he felt relieved and ______ himself with satisfaction.
A．expanded
B．stretched
C．prolonged
D．extended
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