His sister left home in 1998,and has not been heard of since

His sister left home in 1998,and has not been heard of since His sister left home in 1998,and-----since.A has not been he His sister left home in 1998,and ＿ since.A.had not been hear 选择His sister left home in 1998,and ____since.A has not been His sister left home in 1998,and_______ ever since. His sisterleft home in 1998,and___since.为什么填has not been hea His uncle has not been back ( ) he left home three years ago it has been three months since he left his home(4个同义句)并说一下解释 It has been three hours since he left his office.把has been 换 The old man has ---lonely since since his wife left.是填BEEN么 His father has been lived in the town since 1950... she has been heard of