I spent the whole day ( )in my study.

问题描述:

I spent the whole day ( )in my study.
In order not to be disturbed ,I spent the whole day ( )in my study.
A locked
B locking
不能用B 理解成 spend sth (in) doing

spend time doing是指花费时间做某事,而这句里实际是说“我让我自己被锁在书房里一整天,以便不被打扰”,因此需要选择被动语态的locked