What effects will the Olympic Games have ______ the host city? 为什么填on?

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WhateffectswilltheOlympicGameshave______thehostcity?为什么填on?WhateffectswilltheOlympicGameshave______t

What effects will the Olympic Games have ______ the host city? 为什么填on?
What effects will the Olympic Games have ______ the host city? 为什么填on?

What effects will the Olympic Games have ______ the host city? 为什么填on?
固定用法：have effects on ...对……有影响
故填on