A

40. A. showing                   B. noticing                   C. losing                      D. breathing

39. A. before                       B. after                        C. until                        D. since

38. A. unlocked                   B.shut                         C. broke                             D. knocked

37. A. see                                   B. feel                         C. taste                        D. smell

36. A. fast                           B. slowly                      C. safely               D. well

35. A. on fire                             B. in trouble                C. in danger                 D. on sale

34. A. neighbor                   B. receiver                   C. worker                            D. speaker