People should complain when they consider an advert offensive.如果认为广告令人愤怒, 就应当投诉。

'I do everything you ask of me,' he complained.他发牢骚说：“我对你是有求必应。”

The American couple complained about the high cost of visiting Europe.这对美国夫妇抱怨说欧洲旅游费用很高。

I'm going to complain to the manager.我要向经理控诉。

The neighbours complained to the police about the noise.邻居们就噪音的问题向警方投诉。