单选题 How she wishes she ______more attention to her lessons when she was at school!

【正确答案】 C
【答案解析】[解析] 本题考查虚拟语气的用法。wish后面的宾语从句,用动词的过去时表示与现在的事实相反;用had加过去分词,表示与过去事实相反。本句中when she was at school是过去的时间,故选C。