She often hears someone --------songs in the room.A.to sing B.singing C.sing D.sang

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Sheoftenhearssomeone--------songsintheroom.A.tosingB.singingC.singD.sangSheoftenhearssomeone--------

She often hears someone --------songs in the room.A.to sing B.singing C.sing D.sang
She often hears someone --------songs in the room.A.to sing B.singing C.sing D.sang

She often hears someone --------songs in the room.A.to sing B.singing C.sing D.sang
B hear sb doing 表示听见某人正在做某事 这句话的意思是 她经常听见在房间里唱歌

C hear sb doing 听到某人正在做某事
hear sb do sth 听到某人做了某事
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C hear sb do sth 听到某人做某事(表示通常情况下听到,从often可知要填do sth)


hear sb doing sth 听到某人正在做某事