he spent 6 hours — in the room . A locking B locked C locked himself

问题描述:

he spent 6 hours — in the room . A locking B locked C locked himself

这里有主被动两种解释:
1.他被锁在房间里6小时.
如果是being locked的话,应该说是最好的.
2.句子选项既然没有,就用A.
他把自己锁在房间6个小时.(Spent doing sth的用法)