ELder people must_ A.be spoken to politely B.speak to politeC.be spoken politeiy D.speak polite
问题描述：
ELder people must_ A.be spoken to politely B.speak to politeC.be spoken politeiy D.speak polite
答
A为什么啊？跟长辈说话要有礼貌。 speak 是不及物动词，所以要加to