In order not to be disturbed I spent three days in my study.A. lockingB. lockedC. to loc

问题补充：

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

A. locking

B. locked

C. to lock

D. lock

答案：

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。