题目

He finally bought several books by Tom, _____ is one. A. which of them   B. which of whose      C. of which this D.any of them 答案：C 解析: 考查介词与关系代词的搭配。依据句意他最后买了几本汤姆的书，这是其中的一本可知。8、In order not to be disturbed, I spent three hours _______ in my study. A. locking          B. locked           C. to lock          D. to be locked