单项选择题

Some birds consistently return to the same nesting area each spring.

A．occasionally
B．purposely
C．regularly
D．surprisingly
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单项选择题
A person who deals with the public must be courteous at all times, even when he or she is very tired.
A．forthright
B．polite
C．decisive
D．neat
单项选择题
Writing is a skill that requires consistent practice.
A．invariable
B．orderly
C．regular
D．customary
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