单项选择题

A．all
B．whole
C．every
D．each
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单项选择题
A．wasB．isC．has beenD．should be
A．was
B．is
C．has been
D．should be
单项选择题
A．opened toB．open toC．opening forD．opened for
A．opened to
B．open to
C．opening for
D．opened for
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