21.________number of people who own luxury cars is on ________increase every year.

      A.A; the                    B.A; an                      C.The; the                  D.The; an

22.In China, as we all know, brides are often dressed in red as it is a________of good fortune.

      A.slogan                     B.brand                      C.logo                        D.symbol

23.Mark’s fluency in English gave him a big advantage________the other applicants for the job.

      A.against                    B.over                        C.than                        D.beyond

24.Mountain climbing must be very tiring, ________,you might feel sick with the air getting thinner.

      A.In addition              B.In turn                    C.In return                 D.In case