if he_,he__ that food.A.was warned ;would not take B.had

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if he___,he____ that food.A.was warned ;would not take B.had been warned;would not have taken
选哪个,为什么,

B
这句是虚拟语气的句子
意思是：如果他有被警告过,他就不会吃那食物了.
这是表示与在过去时间内发生的事实相反的语气,所以用虚拟语气.用法（表示过去）,从句中用过去完成时,主句中用过去将来完成时,都表示与过去事实相反.
if he had been warned 如果他被警告了（事实上过去没有人警告他）
he would not have taken that food 他就不会吃那食物（事实上过去他吃了,而且还发生了某种后果,所以是完成时,在过去的语境中表示“就会怎么样”,用过去将来完成时）

if he___,he____ that food.A.was warned ;would not take B.had Mr guo is a teacher,but if he___(be)a truck driver,he____(ha Bob would have helped us yesterday ,but he____ A.was busy B. At that time people would starve if food was difficult to fi it never would have happened if he had not had a flat tire o If it were not for the fact that she ( )ill,she would take p (单选)①If my father ___ here ,I would not be hurt.A,is B,was C It was not such good food ( ) he had promised.Athat B as No one knew __ A if she would come or not B.if she would com last week we promised that he____ today,but he had not arriv If she had worked harder,she_____ A.would succeed B.would ha 几个中学英语问题If he .,he.that food ( B)Luckily he was sent to the