语音判断（四选一）
(     ) A.girl      B.first      C.bird        D.litter
(     ) A.her       B.sir         C.were        D.centre 
(     ) A.dirty      B.birthday    C.today       D.skirt
(     ) A.shirt     B.nurse      C.her         D.yesterday  
(     ) A.her       B.brother    C.worker      D.sister
(     ) A.yesterday  B.sir        C.September   D.ago 
(     ) A.bird      B.winter     C.teacher      D.summer
(     ) A.cleaned   B.talked     C.looked      D.worked 
(     ) A.showed    B.called     C.named        D.did 
(     ) A.jumped     B.cooked     C.liked        D.visited