When I entered the classroom, I saw Mary ______ at the desk and ______ a letter
A.seating; writing
B.seated; wrote
C.sitting; wrote
D.seated; writing
网友回答
D解析考查非谓语动词。第一空Mary与seat为动宾关系要用过去分词作补语，与sit为主谓关系要用现在分词作补语；第二空Mary与write为主谓关系要用现在分词作补语。故选D。句意：我走进教室看到玛丽坐在桌子旁边写信。