Often he ________ sit for hours doing nothing at all in fron

Often he ________ sit for hours doing nothing at all in fron I would sit there for hours,doing nothing at all. 30.He____ sit there for hours sometimes,doing nothing at all Often he would sit for hours doing not 请问 He would sit for hours doing nothing.为什么要用doing呢? He used to sit for hours _____nothing in the boat ,选doing,是不 When the old man was alive,he _ sit for hours at the door When the old man was alive,he ____ sit for hours at the door He often spends two hours in doing his homework every day.(改 He often ________(have) dinner at home. Dr.Li is proud of his son for he often ________(win)prize in But he often f______ for hours without catching anything