单项选择题


A．need know
B．want to learn
C．need to know
D．need to study
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单项选择题
A．thereB．whereC．whichD．that
A．there
B．where
C．which
D．that
单项选择题
A．some timeB．sometimeC．sometimesD．some times
A．some time
B．sometime
C．sometimes
D．some times
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