Question

—What’s the name of the song?
—Yesterday once more. It         when I was a student.
A. sang                
B. was singing             
C. was sung

Answer 1

C

解析试题分析：句意：--这首歌的名字是什么。----昨日重现，当我还是一个学生的时候它就被唱。Be done 表示被动语态，根据句意故选C.
考点：考查动词时态的用法。