这个谜语的答案就藏在问题本身中。

The answer to this ___riddle is hidden within the question itself.

士兵们的盾牌被敌人的机枪子弹打得千疮百孔。

The soldiers' shields were ___riddled with bullet holes from the enemy machine guns.

他的演讲充满了自相矛盾的观点。

His speech was ___riddled with contradictory arguments.