old people must____.A.be spoken to politely B.be spoken politely

题目

old people must____.A.be spoken to politely B.be spoken politely
选哪个,为什么

答案

a,因为在这里speak是“和某人说话的意思”,属于不及物动词,和...说话用speak to sb
这句话意思是,和老人说话时一定要有礼貌,Speak to old people,用的被动语态,介词不能省略.就变成这样了