48．A．a stranger            B．exciting               C．a surprise              D．a letter

47．A．a business            B．a busy                 C．an experience         D．a direct

46．A．had                     B．past                     C．went by               D．goes by

45．A．in                       B．between               C．with                    D．for

44．A．more                   B．much                   C．many                   D．some

43．A．sad                      B．quickly                C．happy                  D．happily

42．A．fill with               B．full of                 C．in                        D．full with

41．A．met                     B．made                   C．communicated        D．called

40．A．costs                   B．takes                   C．pays                    D．spends

39．A．relaxed                B．happy                  C．alone                   D．lonely