这台收音机是上个世纪的产物。

This radio is a product of the last ___century.

这座城堡建于18世纪。

This castle was built in the 18th ___century.

这位击球手在比赛中打出了他的第五个百分。

The batsman scored his fifth ___century in the match.

古罗马军队中，一个百人队通常由经验丰富的士兵组成。

In the ancient Roman army, a ___century was typically composed of experienced soldiers.