--Jack's never worked hard at English, _______?-- _______ , so he can't answer the question in English, I think.A.is he; Yes, he isB.is he; No, he isn'tC.has he; Yes, he hasD.has he; No, he hasn't
网友回答
D解析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。