宾语从句的反义疑问句怎么回答

以I作为主句加that从句的宾从应该怎么回答啊？原理是什么？
--I don't think he's guilty, _____________ he ?-- ___________ . Lots of people saw him at his sister's wedding . A. isn’t , Yes B. is , Yes C. isn’t , No D. is , No
具体题目是这样的，求详细解释~

答案：D
解析：I don't think he's guilty，这是一个否定句，别管他是不是宾语从句，现在先了解这是一个否
定句，然后否定句的反义疑问句用肯定，所以第一个空是is。
然后分析后面的句子， Lots of people saw him at his sister's wedding，很多人在他妹妹的婚
礼上看到了他，根据意思，很多人给他提供了不在场证明，说明他是无罪的，所以没有罪就
NO，故选D。

看你说参考答案是B，难道应该这么理解，很多人在婚礼上看到他，难道指在婚礼上看到他犯罪了的意思？

i think that he is not an honest boy, is he ？其实这个句子应该是i don't think that he is an honest boy, is he？ 注意主句为一人称时，改反义疑问句时有从句确定，其余的有主句确定 如they don't think that he is an honest boy,do they ？