题目

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   答案： 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。

查看本题答案和解析