Question

---Sorry, I didn’t hear the door bell ring.
---Your bell         . Perhaps it needs repairing.

1. A.
   never worked
2. B.
   is never working
3. C.
   never works
4. D.
   had never worked

Answer 1

C
频度副词一般搭配一般现在时态使用，句子主语the  bell为单数第三人称，谓语动词后面加s，故选C。