1.I often hear him____this song.

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1.I often hear him____this song.
A.sing B.singing C.sings D.to sing
2.They heard the girl____the piano at this time yesterday.
A.play B.playing C.to play D.played
3.They learned____about Chinese hisyory.
A.a lot of B.lots of C.a lot D.lot

A
这里是表示"经常听到他唱这首歌,所以是hear sb do sth.(表示一般经常...)
B 这里用hear sb doig sth,因为后面有at this time yesterday.强调昨天的这个时候正在...
C 这里的a lot仅仅表示程度大.不是a lot of 结构.

I often hear her sing this song I often hear her sing the song.(改为被动语态) I often hear him sing the same song被动语态 i often hear her sing a song变被动句 I often hear her___the English song in her room. I often hear the song _____on TV.（sing） 1.We often hear the song ____(sing) in English. I‘ve often heard her sing this song.与I often hear her sing t I OFTEN HEAR HIM _ AN ENGLISH SONG ,AND YEATERDAY I HEARD HI People often hear her___(sing) this song we often hear the girl ( ) (sing) song. we often hear her sing the song