The girl is often heard ____ (to sing / singing )happily in

The girl is often heard ____ (to sing / singing )happily in The girl was often heard ( ) happily in her room. The girl was often heard _________ happily in her room. He is often heard -----in the next room.A sing B to sing C s I often hear her( )in the next room.a/sing b/is singing c/to she is often heard to to sing in the room 有无语病 She was often heard ( ) in English.A.sing B.singing C.to sin 1.The girl was often heard ( ) happily in her room.（09 泰安） 将We often hear the girl sing happily in her room改为被动语态 I heard him ____ in the next room just now.A.singing B.sing The girl is often heard _______ in the next room. We often heard the girl sing the English song in the next ro