这家商店对所有商品都提供固定价格，所以你能确切知道要付多少钱。

The store offers ___fixed prices for all items, so you know exactly what you'll pay.

许多抵押贷款在头几年都附带固定利率。

Many mortgages come with a ___fixed interest rate for the first few years.

这次旅行有固定的行程安排吗，还是我们可以自由探索？

Does the tour have a ___fixed schedule, or can we explore on our own?