This is a__________． Those are three__________．（knife）

This is a __.Those are three__(knife) this knife is jim's. Is this your sister?(改为复数句） Those are Zhang jie is aunts.(改为 1、Whose（）(knife) are those?2.There () (be) some fruit and so This knife is sharp and that knife is blunt 翻译 Is this a bus?(改为复数形式） Those are erasers.(改为单复数形式） this is （ ）apple.those are（ ）.A.a,banana B.an ,banana C.an,b 变一变 Are those oranges?(改为单数句） Is___ ____orange?2.This is a b 句型转换 This is a red tomato（改为复数句） Those English books are goo this is a bag of pears.（改为一般疑问句） those are donkeys over ther 填am、is、are This （）an apple.Those()oranges.Where () Tim and T what are those?和what is this?该怎么回答