I often hear birds____in the tree.A.sing B.C.sings D./

I often hear the little girl___(cry)in the morning I often hear him _____ ( sing ) in the next room. i often hear her sing a song变被动句 i often hear jim ----（play）violin at home I often hear the song _____on TV.（sing） I often hear him ( ) in the room I often heard him ( ) in the room I often hear her （）in her room . Ato sing BsingingI often hear her （）in her room .Ato singBsingingCsingDsings I often hear him _____(cough)when I pass his room. I often hear her sing this songsing不用第三人称单数吗?为什么不是时间是I often hear her sings this song i hear ______it said that he is not to be trusted A.Often I heard B.Often did I hear C.Often have I heard I often hear from my pen pal .I often ____ ____ ___ ____ my pen pal .I often __ __ __ __ my penpal I have (hear) of him.We often hear Jay,but we didm't hear Him.A,of,from B,from,of C,abou i often hear the girl _____(sing) loudly.用正确形式填空,说说理由,这里有个often，我想是不是不适合hear sb doing st这个短语？ I often hear him sing the same song被动语态He ____ often ____ ____ sing the same song. 我经常听见她唱歌,英语怎么说I often hear ______ _______. I often hear her _____ (sing)in the next room last year.为什么不能用singing? I often hear her _(sing) in the morning ,填什么?为什么