I often see you _____ the old man do the housework

I often see the old man ( ) in the park. Betty is often seen ( )the old man with his housework... I often see the old man____morning exercise.A.do ---Do you often see Mr Smith _____ on the playgroud? 1、-【】you【】（konw）the old man?-Yes,I do. I often see an old man--newspaper to make a living on the st The girl often helps the old man _____ water. We often see the old man sit there.转换成The old man is often__ I often meet a poor old man on the _____ home. Do you often help your mother ____ the housework? I often do some housework in the back y( ). I can see _____ old man sitting on the chair .横线上应该填什么?