题目

Tony ________ football every weekend when he was in primary school.A.plays B.played C.is playing 答案：【答案】B【解析】句意：当托尼上小学时，每个周末都踢足球。考查动词时态。A. plays一般现在时；B. played一般过去时；C. is playing现在进行时。根据时间状语从句when he was in primary school.当他上小学的时候可知，主句应用一般过去时，故选B。设已知抛物线C的顶点在坐标原点，焦点为F(1，0)，直线与抛物线C相交于A，B两点.若AB的中点为（2，2），则直线的方程为_____________.