these aren't their brothers改为单数句 jack is my brother's good friend.改为一般疑问句,并做肯定回答is this your sister 改为复数句

把these aren't their brothers改为单数句 These aren't their brothers. (改为单数句） 改错(每句一处错):These desks and chairs aren't their ——Are these ( ) —— No,( ) a.bananas;they aren't b.two bananas; aren't c.his bananas ; they ar——Are these ( )—— No,( )a.bananas;they aren'tb.two bananas; aren'tc.his bananas ; they ared.their bananas; they aren't Their parents ( )at work A.aren't B.don't those are your books ,_____?a aren't you b aren't they c aren't these d aren't those 1.Are their book on the desk?No _ A.their aren't B.they aren't are these （their） tickets为啥填their NO,they are not （their）为啥填their Their aren't here为啥填theirs are these your english books A.yes ,it is B.no ,we aren't C.no ,they aren't. The children ( ) doing their homework.A.aren't B.isn't C.don't D.not （ ）1.Are there geese in the pond?A.some B.any C.a lot（ ）2.---What are these?--- are geese.A.These B.They C.Their（）3.They with their friends.A.plays B.playing C.are playing（）4.---Can they swim?---No,they .A.don’t B.can’t C.aren’t These aren’t erasers.（单数） these questions aren't easy _____(answer) these aren't interesting hobbies.(单数) Are these cards?NO,they aren't cardsAre these( ) cards?NO,they aren't( )cards.A your,your B your,my C my,my D mine,your --Are those your your dictionaries?--_______A.Yes.these are B.NO,these aren't C.No,they aren't D.Yes,it is 为什么？ are ( )pigs?no,they aren't.A.these B,them C,you D,it these dolls aren’t （ ）A,her B,hers C,she D,she’s