单项选择题

Who will pay for the call

A．The man.
B．The operator.
C．The man’’s sister.
D．The man and his sister.
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单项选择题
A．atB．forC．inD．on
A．at
B．for
C．in
D．on
单项选择题
For some time now, world leaders_______out the necessity for agreement on arms reduction.
A．had been pointing
B．have been pointing
C．were pointing
D．pointed
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