题目内容：

把下面的句子改为一般疑问句 并作肯定或否定回答 I an in Class FIve,GRade Seven They are in Class ELe
He is twelve years old

优质解答

are you in class five,grade seven?
yes,i am.no,i am not.
are they in class eleven?
yes,they are.no,they aren't.
is he twelve years old?
yes,he is.no,he isn't.