44．A．return back       B．return                 C．reach                  D．arrive

43．A．how                 B．which              C．what                  D．why

42．A．also                 B．too                  C．either                 D．then

41．A．that                 B．how                 C．if                       D．which

40．A．down               B．off                   C．behind                D．back