The old should be spoken to politely 为什么副词前有to

The old should be s___ to politely. You should be f( ) to the old. The pupils should be p to the old people. The children should be p____to the old people 翻译：The old should be spoken to politely . the old man should be ___(take) good care of. You should be polite to the old.改为祈使句 （Be polite to the old ),( ).要添括号中的词 一道初二英语填空~~~~~~~~~~~~~~~~~~~~~The old men should be spoken to ▁▁▁.错了！！！，是：The old men should be spoken to p▁▁▁. The old and dangerous house in the neighborhood should be p________ down at once youngh people should be good()old people I think the old should be spoken to _____(polite)应怎样填呢?Any why? the old should be spoken to politely求翻译,其中副词前加to是什么用法? The old should be spoken to politely 为什么副词前有to the old man should be spoken to______A.quickly B.politely C.properly D.vacuum we should all be kind to the old这句话有语病没 请问Should old acquaintance be forgot for the sake of all ensang是什么意思? My mother is an-----------[account]in a company.you should be------------[politeness]to the old. We should try ____ the old people,because we will be old in the future,too.A to polite toWe should try ____ the old people,because we will be old in the future,too.A to polite to B to be polite with C not to be polite with D to be polite to