the old men shoule be spoken to p()

the old men shoule be spoken to p() The old men must ______politely.A.be spoken B.be spoken to C The old man shoud be spoken to must the old people be spoken to polity 为什么用 be spoken to I think the old should be spoken to _____(polite) 翻译：The old should be spoken to politely . We all know that the old should be spoken to ( ) 17.Old people must_____.A.be spoken to politely B.speak to p Old people must be spoken to politely . the old man should be spoken to______ the old should be spoken to politely求翻译,其中副词前加to是 The old should be spoken to politely 为什么副词前有to