Which sentence shows proper subjunctive mood? A. If he arrives early, we'll start. B. I wish I was taller. C. Had he arrived earlier, he would have seen it. D. It's time we go home. 答案解析 核心考点：虚拟语气结构 解题思路：正确选项需体现虚拟条件句的倒装结构。 选项分析：A. 真实条件句；B. 错误（应were）；C. 正确（倒装虚拟条件句）；D. 错误（应went）。 易错点：注意虚拟语气中be动词统一用were的特殊规则。 正确答案：C