Question

--Jack's never worked hard at English, _______?

-- _______ , so he can't answer the question in English, I think.

1. A.
   is he; Yes, he is
2. B.
   is he; No, he isn't
3. C.
   has he; Yes, he has
4. D.
   has he; No, he hasn't

Answer 1

D
Jack’s此处为Jack has的缩写，因句中有never，故附加问句应用has；答句说明的是否定情况，故应用No，he hasn’t。