几个世纪以来，美洲原住民与欧洲定居者进行贸易。

For centuries, Native Americans ___traded with European settlers.

这家公司多年来一直在进行石油贸易。

The company has been ___trading in oil for many years.

我们的书籍在整个亚洲都有贸易。

Our books are ___traded right across Asia.