Listen Joan (sing)in the classroom .She often (sing)there.

Listen Joan (sing)in the classroom .She often (sing)there. listen!she（）in the classroom.A.is singing B.sing C.to sing D Listen!Who____(sing)in the classroom? Listen,someone____(sing)in the classroom. We often sing in the classroom.(sing划线） ____________________ Listen!she ( )(sing) in the room. Listen!She in the classroom.A.sing B.sings C.singing D.is si listen .Some girls _(sing)in the classroom怎么填 2.Listen .Some girls _______________ ( sing)in the classroom 改被动:We often hear them sing in the classroom. We often see him sing in the classroom为什么sing不用加s啊? Listen!The girl____ (sing) over there.