That day I saw some parents at the back of the classroom, to the teacher. A. sitting, listened B. sat, listened C. sitting, listening D. sat, listening [解析]答案:C.该题考查的是see sb. doing sth.的句型结构和分词作状语的用法.第一个空stting在句中作saw的宾语补足语.第二个空listening做伴随状语. 【查看更多】
