单项选择题


A．at
B．back
C．in
D．to
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单项选择题
A．would doB．doesC．would makeD．makes
A．would do
B．does
C．would make
D．makes
单项选择题
A．in factB．in seriousC．in earnestD．in truth
A．in fact
B．in serious
C．in earnest
D．in truth
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