48．A．old               B．young                  C．strong                    D．weak

47．A．listen            B．remember            C．think                     D．hear

46．A．but               B．and                     C．or                          D．if

45．A．best              B．good                   C．worst                     D．better

44．A．easily           B．slowly                 C．hurriedly                D．quickly

43．A．runs             B．puts                     C．throws                   D．takes

42．A．sometimes    B．usually           C．never                     D．always

41．A．see               B．watch                  C．1ook                      D．find

40．Which sign means you can’t go straight?