单项选择题

It's nearly eight o'clock. John ______ be here at any moment.

A．must
B．need
C．should
D．can
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单项选择题
How wonderfully she sings! I have never heard ______.
A．the better voice
B．a good voice
C．the best voice
D．a better voice
单项选择题
He is a gifted musician and often play ______ flute at home.
A．a
B．the
C．×
D．an
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