单项选择题

Swimmers should avoid ______ ocean areas that are dangerous.

A．enter
B．to enter
C．entering
D．be entered
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单项选择题
It is a very important game, and it is advisable to ______ seats well in advance.
A．book
B．get
C．provide
D．take
单项选择题
New Orleans is a city ______ older traditions can still be seen.
A．those
B．that
C．which
D．where
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