His special interest in__________increased during his stay in England. A. book B. theater C. stamp D. written

选B.因为book和stamp均为可数名词,用在此句中应该为复数形式,即books或stamps；而theater作为可数名词表示剧场、剧院,用作不可数名词表示戏剧.朗文当代英语词典theatre词条下第二个释义为：”[U] a) plays as a form of entertainment:I enjoy theater and swimming.b) the work of acting in,writing,or organizing plays:She's been working in the theatre for over thirty years.written为过去分词,不能当作名词用.
另外,本题的考点在于名词的泛指表达法.（这方面的知识如需要可以继续追问）