. If it ______ for the fence, he ______ into the river. A. were not; fallen B. had not been; could have fallen C were not; could fall D. had not been; could fall
第二部分:英语知识运用(共两节,满分45分) 第一节、单项选择(共15小题,每小题1分,满分15分) Chinese Vice-Premier called on Thursday for _____ all-out effort to ensure _____ food and drug safety.