（）Though I have often heard this song ,I have never heard y

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（）Though I have often heard this song ,I have never heard you it.
A.being sung,sang
B.sang,singing
C.sung,sing
D.to be sung,to sing
为什么?

C
1 hear sth done 听到这首歌被人演唱所以用过去分词做宾补；
2 you sing it 人做主语,应当用主动形式.

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（ ）Though I have often heard this song ,I have never heard y