题目内容
11. 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
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题目内容
11. 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