Question

【题目】Betty is often seen the lonely old man with his housework.

A. to helpB. helpingC. helpsD. helped

Answer 1

【答案】A

【解析】

句意“贝蒂经常被看到帮助老人做家务”。根据see sb doing“看到某人正在做”；see sb do“看到某人做某事（全过程）”可知，本句话表示“看到全过程”，省略to，变成被动时，to要加上，即sb be seen to do，故选A。