单项选择题

A．because
B．caused
C．due
D．owed
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单项选择题
A．althoughB．as thoughC．unlessD．until
A．although
B．as though
C．unless
D．until
单项选择题
A．would giveB．would haveC．would have hadD．should have
A．would give
B．would have
C．would have had
D．should have
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