题目内容：

He spent an hour the room
A to finish cleaning B to finish to clean C finishing cleaning D finished cleaning
spend 时间 in doing sth 我懂 那么就是C了 但是 如果A选项的目的状语 他花费1小时去完成打扫房间
可不可以呢

优质解答

C
spend doing
finish doing
spend ...finishing doing