48．A．instead               B．instead of             C．besides             D．except

47．A．at                   B．to                   C．over                D．of

46．A．don't mean            B．mean                 C．don't like             D．like

45．A．since                B．if                   C．because             D．after

44．A．to be started           B．to be made            C．to be changed         D．to be known

43．A．solve                B．find                 C．know               D．find out

42．A．learn                B．see                  C．find               D．show

41．A．speaking             B．thinking              C．seeing              D．reading

40．A．thought               B．wanted                C．needed                     D．felt

39．A．to forget              B．forgetting             C．to remember          D．remembering