如果你对服务不满意，为什么不向酒店经理投诉呢？

If you're ___dissatisfied with the service, why don't you complain to the hotel manager?

然而，我必须说博物馆真的很有用，可以了解世界历史，这就是为什么人们即使有时不满意也会继续去那里。

However, I must say that museums are really useful, to understand the history of the world, and that's why people keep going there even though they're sometimes ___dissatisfied.

许多顾客对产品质量不满意。

Many customers are ___dissatisfied with the quality of the product.