_____(give)a seat to someone on the bus is polite

问题描述:

_____(give)a seat to someone on the bus is polite

Giving,这里表示主动让座给人是礼貌。
如果用Given,就是指被让座了,与句子意思不符合。

__Giving___(give)a seat to someone on the bus is polite
在公交车上给人让座是礼貌的