In order not to be disturbed, he spent two hours in his study.
A. locking
B. to lock
C. locked
D. being locked
网友回答
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。