A.the buyers search from place to place for desired object
B.the government selects the best items
C.the government transacts with an individual
D.the sellers compete with each other for the bid
A.a want, a need
B.a need, a want
C.a machine, a tool
D.a tool, a machine
A.commodities that people buy constantly
B.commodities that people do not really want
C.commodities that people want but don't need
D.commodities that are inconvenient to purchase
A.that satisfy similar needs of the consumer
B.that consumers don't care where to buy them
C.that consumers spend much time..to look for
D.that can be found in nearly every shop