In formal writing, which expression is appropriate for hypothetical situations? A. If I was rich B. If I am rich C. If I were rich D. If I will be rich 答案解析 核心考点：虚拟语气 解题思路：虚拟条件句需用were代替was 选项分析：C正确（标准虚拟语气结构），A/B使用真实语气，D将来时错误 易错点：可能误选A（口语化表达） 正确答案：C