Several loudspeakers are _______ from the ceiling and we can hear the speaker very clearly.
D
暂无解析
Thismorningintheclass,ourteacherlosthis______atlastbecausehecouldnotstandanymore.
Thisriverissobigthatitisimpossibletobuilda_______underitwithoutmoderntechnology.
Withoutapropereducation,peoplecould_______allkindsofcrimes.
Asateacher,youshouldnot_______thestudentsfromaskingquestionsinclass.