Though I have often heard this song . I have never heard you it.A.being sung, sa
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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
试题答案
C
C。第一空填 sung，因为 song 与 sing 是被动关系；第二空填 sing，因为 you 与 sing 是主动关系。