old people should be spoken politely______(填一个介词)

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old people should be spoken politely______(填一个介词)

old people should be spoken politely______(填一个介词)
old people should be spoken politely______(填一个介词)

old people should be spoken politely______(填一个介词)
to
speak to

we should speak to old people politely. 主动
old people should be spoken to politely. 被动
动词词组 speak to sb