these questions aren't easy _____(answer)

these questions aren't easy _____(answer) answers to these questions. these please yourself answer questions these are my______(open)questions These questions are too hard. these are my________(Open)questions. These aren’t erasers.（单数） look at these dwarfs. they aren't________. these aren't interesting hobbies.(单数) These are[ ]questions.You can answer them[ ] who knows the_____(answer)to these questions are these apples 的否定回答是no,they aren't还是no,these aren't. 把these aren't their brothers改为单数句 These aren't_____(they)seats.______(them)are over there. 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