单项选择题

A．changed
B．settled
C．differed
D．developed
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单项选择题
A．butB．thoughC．evenD．because
A．but
B．though
C．even
D．because
单项选择题
A．howeverB．becauseC．althoughD．when
A．however
B．because
C．although
D．when
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