单项选择题


A．easy
B．possible
C．hard
D．proper
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单项选择题
A．designedB．requiredC．refusedD．reported
A．designed
B．required
C．refused
D．reported
单项选择题
By the time Tom makes up his mind, the offer ______.
A．is cancelled
B．will cancel
C．will have been cancelled
D．will be canceling
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