a. a pair of complementaries
--> male/female
b. a pair of relational opposites
--> solid/gas; male/female
c. a pair of homophones
--> two/too; past/passed
d. a pair of gradable opposites
--> shiny/dull
e. two members of a set of multiple complementaries
--> solid/gas, solid/liquid, solid/fragile, solid/floral
(not sure how multiple complementaries is defined in your textbook)
The following link may be helpful to you:
http://pandora.cii.wwu.edu/vajda/ling201/test3materials/semanticsHANDOUT.htm
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