A.B2B B.C2C C.B2C D.C2B
A.slow B.fast C.high D.low
A.prospect B.decision C.prospectus D.award
A.private B.public C.open D.closed
A.NASDAQ B.New York Stock Exchange C.Hong Kong Exchanges and Clearing Limited D.Toronto Stock Exchange
A.alcohol B.tobacco C.drugs D.land