单项选择题

Today the public ______ about the way the environment is damaged.

A．is being concerned
B．is becoming concerned
C．has concerned
D．is concerning
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单项选择题
I'd like to ______ a single room with shower for this weekend.
A．fix
B．settle
C．appoint
D．book
单项选择题
I regret to tell you that I have no choice to refuse your application.
A．than
B．and
C．but
D．or
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