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

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

答案B
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。