A.alternateB.establishC.substituteD.replace
A. alternate
B. establish
C. substitute
D. replace
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A.fashionableB.tavorableC.temporaryD.token
A. fashionable
B. tavorable
C. temporary
D. token
A.excessB.extraC.surplusD.ample
A. excess
B. extra
C. surplus
D. ample
A.forB.offC.backD.in
A. for
B. off
C. back
D. in
A.IntroductionB.SpecificationC.RepresentationD.Separation
A. Introduction
B. Specification
C. Representation
D. Separation