单项选择题

Please listen carefully while others ______.

A．speak
B．speaking
C．spoken
D．spoke
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单项选择题
Many a way ______ tried already.
A．has been
B．are
C．being
D．have
单项选择题
Never ______ ! Josh met such a complicated situation.
A．did
B．could
C．will
D．had
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