Tom,is your pencil?-No,it isn't mine.it's________a.someone e

(yes,it is)(ls it an eraser)(no,it isn't)(ls it your pencil is this your pencil case?___a 、yes,it's b 、no,it isn't it isn't your pen,is it?A Yes,it's not mine B No,it's my fri Is this your pencil?-NO,it isn't.-sorry.-____ A..All right B Is this your pen?No,it isn't.Mine is on the desk.这里的Mine用的对么 No,it isn't____.Ithink it is.填mine,your,his,her,hers -Isn't this your hangbag -Yes,it is./No,it isn't.这句话怎么翻译? is this___your pencil case?A Yes,this is B no,it isn't C. 1.Is your bag? No,it isn't ( )bag. 2.It is Bob's.It is ( ). Is Bob your brother?A.no,it isn't.B.no,he isn't.C.no,she isn 填空：Is this____pencil case? No,It isn't my pencil case. Is that his pencil?No,it isn't.改为复数形式