单项选择题

A．and
B．but
C．so
D．however
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单项选择题
A．andB．butC．howeverD．either
A．and
B．but
C．however
D．either
单项选择题
What is a phrase book designed for
A．Learning a foreign language.
B．Finding a job to continue to live.
C．Communicating with foreigners.
D．Making their work less hard.
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