Question

Mr.Smith as well as his students, ________ a song in English when I came in．

1. A.
   sang
2. B.
   were singing
3. C.
   was singing
4. D.
   is singing

Answer 1

C
解析：
此题考查主谓一致。句子的主语是Mr．Smith, as well as连接的成分不作主语，因此谓语动词要用单数，受“when I came in”从句限制，要用过去进行时。