在他获奖之前，我从未听说过他。

I ___had never ___heard ___of him before he won the prize.

这是一个大多数人都从未听说过的小国家。

It's a tiny country that most people ___have never ___heard ___of.

这位老人从未听说过黑暗鸭，所以他问保罗它是什么。

The old man ___had never ___heard ___of the Dark Duck, so he asked Paul what it was.