单项选择题


A．assigned
B．designed
C．proposed
D．programmed
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单项选择题
A．thatB．howC．whetherD．when
A．that
B．how
C．whether
D．when
单项选择题
A．have writtenB．to be writtenC．are writtenD．write
A．have written
B．to be written
C．are written
D．write
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