In order not to be disturbed ,I spent three days in my study.
A. locking
B. locked
C. to lock
D. lock
网友回答
A. locking
(答案→)B. locked
C. to lock
D. lock
解析：本题应跳出思维定势的干扰，不是考查spend some time doing的用法。此句的语义环境为为了不被打扰，我把自己关在书房里呆了三天。lock in my study 作伴随状语。故选B。