单项选择题


A．proceeding
B．development
C．process
D．advance
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单项选择题
A．sinceB．becauseC．thoughD．however
A．since
B．because
C．though
D．however
单项选择题
A．directionB．trainingC．educationD．instruction
A．direction
B．training
C．education
D．instruction
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