Betty is often seen___(help)the old man with his housework.

问题描述:

Betty is often seen___(help)the old man with his housework.

to help
祝你学习进步,更上一层楼!请记得采纳,谢谢!(*^__^*)

to help
贝蒂经常被看到帮助老人干家务,被动语态中不能省略to