They have finished doing their homework.Their homework _ _ _

They have finished doing their homework.Their homework _ _ _ They have finished doing their homework(改写句子) they finished their homework They ought to have finished their composition last Sunday ,_ ( )They have finished their homework,and_______. They must have finished their homework,_______. They have been doing their homework They have already finished their homework（改为否定句） They can't have been doing their homework 急,They have finished their homework( )with the help of their They are doing their homework?对doing their they don't doing their homework now.