单项选择题

A．flexibility
B．distinctions
C．variations
D．alterations
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单项选择题
A．greatlyB．orderlyC．especiallyD．mainly
A．greatly
B．orderly
C．especially
D．mainly
单项选择题
A．howeverB．indeedC．thoughD．therefore
A．however
B．indeed
C．though
D．therefore
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