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
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
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。