it took him three hours to clean his bedroom的同义句
问题描述：
it took him three hours to clean his bedroom的同义句
答
Spend的过去式为：spent spend doing something It takes somebody sometimes to do something 所以正确答案为：He spent two hours doing his homework
答
He spent three hours cleaning his bedroom.
答
he spend three hours to clean his bedroom
原句中take 是物做主语.,spend 是人做主语