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：
此題考查主謂一致。句子的主語是Mr．Smith, as well as連接的成分不作主語，因此謂語動詞要用單數，受“when I came in”從句限制，要用過去進行時。