单项选择题


A.under
B.over
C.on
D.at
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单项选择题
A.developingB.functioningC.goingD.evaluating
A.developing
B.functioning
C.going
D.evaluating
单项选择题
A.employingB.involvingC.changingD.transforming
A.employing
B.involving
C.changing
D.transforming
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