问题补充:
In order not to be disturbed, he spent two hours in his study.
A. locking
B. to lock
C. locked
D. being locked
答案:
A. locking
B. to lock
(答案→)C. locked
D. being locked
解析:句意:为了不被打扰,我将自己锁在书房里度过了三小时。本题易误选A,以为是考查spend...(in)doing结构。其实,不是“锁门”花去了三小时,而是“将自己锁在书房里度过了三小时”,用过去分词短语作伴随状语,选C。