60．A．invent                 B．discover               C．prefer                    D．find

A

59．A．same                   B．difficult               C．different                D．delicious

58．A．to                       B．for                      C．with                             D．by

57．A．terrible                B．common              C．serious                   D．unusual

56．A．impolite              B．polite                         C．wrong                    D．forgetful