单项选择题


A．reason
B．contribution
C．explanation
D．relation
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单项选择题
A．necessarilyB．properlyC．appropriatelyD．accurately
A．necessarily
B．properly
C．appropriately
D．accurately
单项选择题
A．variousB．subsequentC．latestD．previous
A．various
B．subsequent
C．latest
D．previous
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