单选题 --The book isn't easy for Jack to understand, is it?
-- ______. His foreign language is far better than expected.
A. No, it isn't B. I'm afraid not
C. I don't think so D. Yes, it is

【正确答案】 D
【答案解析】句意为：一这本书对杰克来说不容易理解，是吗?
—不，他的外文水平远比预期的要好得多。
这是一道语境判断题，同时考反意疑问句的回答，D项的回答译过来是“不，这本书对杰克来说很容易”。