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.該題考查的是see sb. doing sth.的句型結構和分詞作狀語的用法.第一個空stting在句中作saw的賓語補足語.第二個空listening做伴隨狀語. 【查看更多】
