单项选择题

A．By
B．On
C．Over
D．Up
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单项选择题
A．might wellB．had betterC．are going toD．are about to
A．might well
B．had better
C．are going to
D．are about to
单项选择题
A．BesidesB．ThereforeC．HoweverD．Then
A．Besides
B．Therefore
C．However
D．Then
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