They are behind the dor改为一般疑问句

They are behind the dor改为一般疑问句 they are studying english in the classroom?改为一般疑问句 they are in the study(改为一般疑问句) 将They are cleaning the window.改为一般疑问句 They are near the door.(改为一般疑问句) They are listening to the music now改为一般疑问句 they are working at the moment.(改为一般疑问句） They are near the door. 改为一般疑问句 They are cleaning the classroom.(改为一般疑问句） There are some trees behind the house.（改为一般疑问句） there are some boys behind the house.(改为一般疑问句） The tree ie behind the small house.改为一般疑问句