Question

【题目】When I left my office，I saw the headmaster________to some students at the school gate．

A. talk B. talking

C. talks D. to talk

Answer 1

【答案】B

【解析】试题分析：固定用法为本题主要考查点。句意：当我离开办公室时，我看见校长正在校门口和一些学生说话。see sb. doing sth.看见某人正在做某事；see sb. do sth.看见某人做过某事。结合语境，故选B。