单项选择题

Why are you always late, Mark Can't you ever arrive ______ time

A．on
B．in
C．at
D．by
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单项选择题
The mayor together with his two brothers ______ going to be indicted for accepting bribes.
A．were
B．have to
C．is
D．are
单项选择题
______ when the telephone rang
A．Were sleeping
B．Did you sleep
C．Have you slept
D．Were you sleeping
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