单项选择题 —If he ______, he ______ that food. —Luckily he was sent to the hospital immediately. A．was warned; would not take B．would be warned; had not taken C．had been warned; would not have taken D．would have been warned; had not taken

单项选择题 We cannot entertain your suggestion ______ it does not seem workable. A．because B．for C．so D．therefore

单项选择题 As it involves only a small ______ , we hope you will have no difficulty on promotion. A．quality B．figure C．quantity D．number