50．A．They                   B．These                   C．Some

A

Found：

Is that your blue pencil?

49．A．That                    B．It                         C．Those

48．A．CDs                    B．basketball             C．pencils

47．A．in                       B．on                        C．of

46．A．he                     B．she                       C．his．

45．A．thing               B．hat                       C．things

44．A．to                       B．on                        C．of

43．A．uncle                   B．aunt                     C．father

42．A．sister                 B．mother              C．brother