S is S,D is T是什么意思呢?高分求问!

S is S,D is Army's day is是什么意思 what‘s that building?什么a school.A.there’s B.It’s C.Is it D.T He's already back home,___he? A hasn't B has C is D isn't He's already back home,___he?A hasn't B has C is D isn't 问:( ) is kate? 答:she's twelve He is Tom's father.怎么问 可以问Sandy's sister is who? 海运中T D S是什么意思USD1000/20GP+T+D+S是什么意思 是there is't 还是there's Excuse me,is t()ruler Jim's? Teachers ’Day is the t( ) of S( ).