these aren't interesting hobbies.(单数)

These aren’t erasers.（单数） these questions aren't easy _____(answer) these aren't interesting hobbies.(单数) are these apples 的否定回答是no,they aren't还是no,these aren't. No,these aren't和No,they aren't的区别 My mother aren't feeling well these days是不是把aren‘改成isn’t 把these aren't their brothers改为单数句 These aren't their brothers. (改为单数句） these aren't your invitation cards.they are ____(they) These pupils aren't in the classroom.(一般疑问句) aren't,otebooks,mine,these 连词成句 These are my keys.They aren't( )( ).改为同义句 改错(每句一处错):These desks and chairs aren't their These aren't her pencils.改为同义句 These aren't my pants. They're____(you). those are your books ,_____?a aren't you b aren't they c aren't these d aren't those 有Yes,these are.和No,these aren't.这两种回答吗?大虾请指! are these your english books A.yes ,it is B.no ,we aren't C.no ,they aren't.