单项选择题


A．proposed
B．developed
C．supplied
D．offered
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单项选择题
A．seldomB．sometimesC．alwaysD．never
A．seldom
B．sometimes
C．always
D．never
单项选择题
______ to do the work, I should do it some other day.
A．If were I
B．I were
C．Were I
D．Was I
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