求救!in order not to be disturbed,I spent thin order not to be disturbed,I spent three hours__in my study.A.locking B.locked C.to locked D.being lockedin order not to be disturbed,I spent three hours__in my study.A.locking B.locked C.to locked D.being locked

C答案是错的, 你上面显示的本身就是错误的,哪有to done 的说法? 即使是to lock/to be locked 也不对.
正确答案应为B.locked, 考点: 过分作伴随状语,与spent的动作同时发生. " 我把自己锁在study ( n. 书房 )里度过了三小时.
此题容易误选A或D, 如选D, 好像结构正确了: spend time doing sth. (此处用被动式being done ),但意思不合题意: 难道"锁门"要花三小时吗?
因此,正确答案应为B.locked,

不知

你的答案错了
in order not to be disturbed,I spent three hours___ up in my study.
A.locking B.locked C.to locked D.being locked
答：选b
解析：答案为b,但考生易误选a,以为是考查spend...（in）doing结构.其实,不是“锁门”花去了三小时,而是“将自己锁在书房里度过了三小时”,用过去分词短语作伴随状语.
而C本身就没有这种表述