题目内容
【题目】The singer is often heard _________ in her room.
A.sing
B.sings
C.to sing
D.sang
【答案】C
【解析】句意：那位歌手经常被听见在她的房间唱歌。hear sb do sth听见某人做某事。hear用被动的时候省略的to要还原，即：be heard to do sth。故选C。
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题目内容
【题目】The singer is often heard _________ in her room.
A.sing
B.sings
C.to sing
D.sang
【答案】C
【解析】句意：那位歌手经常被听见在她的房间唱歌。hear sb do sth听见某人做某事。hear用被动的时候省略的to要还原，即：be heard to do sth。故选C。