In order not to be disturbed I spent three hours in my study. A. locking B. locked C. to

问题补充：

In order not to be disturbed, I spent three hours in my study.

A. locking

B. locked

C. to lock

D. to be locked

答案：

A. locking

(答案→)B. locked

C. to lock

D. to be locked

解析：考查过去分词做状语：根据句意“为了不被打扰，我锁在书房里呆了三小时”，可以看出该句不是spend...（in）doing结构。细细分析，其实我们不难看出I was locked in my study这层含义，也就是说，locked in my study描绘了主语I的一种状态。因此该题答案应该为B