单项选择题

A) if C) although
B) unless D) because

A．if
B．unless
C．although
D．because
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单项选择题
A) in C) withB) by D) from
A．in
B．by
C．with
D．from
单项选择题
A) fixes C) focusesB) acts D) comments
A．fixes
B．acts
C．focuses
D．comments
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