44.A.look at                  B.laugh at                      C.worry about                D.talk about

43.A.on the air               B.in the air                    C.by air                         D.off the air

42.A.So                                    B.But                            C.Therefore                   D.Or

41.A.streets                   B.cities                          C.roads                         D.villages

40.A.when                     B.until                          C.because                      D.unless

39.A.least                      B.most                          C.less                            D.more

38.A.suggest                  B.agree                         C.allow                         D.accept

37.A.through                 B.on                             C.in                              D.with

36.A.channels                B.companies                  C.business                     D.stations

35.A.save                      B.earn                           C.spend                         D.lose