A:who is singing in the classroom

A:who is singing in the classroom listen,who is singing in the classroom? Who is singing in the classroom?I want to know 31.—Who is singing in the classroom  — must be Susan .A Who is in the classroom who is singing in the room? Listen!The girl is singing a beautiful song in the classroom Who is the girl in the classroom? listen!she（）in the classroom.A.is singing B.sing C.to sing D Listen!She in the classroom.A.sing B.sings C.singing D.is si who _______ in the classroom?Kitty is. they()in the classroom now A sing B are singing