Someone is singing now.Who （）it be?A.must B.should C.can D.will

someone is singing in the next room.同义句转换 ( ) ( ) someone singing in the next room I heard someone is singing.(改为简单句) 2.Listen!Someone ____ in the next room.A.sing B.singing C.is singing D.are singing Listen!someone is singing there .it ________ beautiful.Ahers Blistens Csounds Dlooks. Someone is singing in the next room.（同义句转换） Listen!Someone is singing next door.Who ( ) it be?填can还是may? I can here that someone is singing now 的同义句 Someone is singing now.Who （）it be?A.must B.should C.can D.will Someone is singing in next room.Please go and see who it is.为什么是 who it is I hear someone singing.我问老师是不是正在进行时,老师说是,那么为什么someone 后面不加上 is 现在进行时不都是 is/are doing Listen!There _____ someone singing in the next room .1 has 2 have 3 are 4 is the boy is singing Jane is good( )singing.( Someone must hear her singing the song.改被动语态. I singing someone doing heard my honework while was I She heard someone was singing（改为简单句） I hear someone singing in the reading room.其中singing 是什么结构呢. Lily is singing.Lucy is singing,too.合并成一句