The boys are kept ________ cleaning the classroom．

The boys are cleaning the classroom now.(改为一般疑问句并作否定回答） The students are cleaning the classroom. They students are cleaning the classroom 对cleaning the class they are cleaning the classroom ____________________________ After they ________ cleaning the classroom,they ________ hom Some boys are talking l____in the classroom. there are many boys ----the classroom now The students are (cleaning the classroom.) 对括号部分提问 The students are cleaning the classroom改为被动语态 the students are cleaning the classroom 否定句 改错：Are the students cleaning the classroom right now?急 The students are cleaning the classroom.用often改句子