complain

许多居民抱怨建筑噪音太大。

Many residents ___complain about the loud construction noise.

如果服务这么差，你为什么没有向经理投诉呢？

If the service was so bad, why didn't you ___complain to the manager?

如果你的餐食是凉的，你应该向餐厅经理投诉。

If your meal is cold, you should ___complain to the restaurant manager.