they[ ]the classroom now.are cleaing all are all cleaning all are_英语解答

they[ ]the classroom now.are cleaing all are all cleaning all are cleaning

人气：326 ℃　时间：2020-03-04 07:54:54

解答

they[ are all cleaning]the classroom now.原因是：all得放在情态动词、助动词以及be动词后,非情助be前