opener

这个开罐器很容易使用。

This ___opener is very easy to use for cans.

他们在赛季揭幕战中以大比分优势获胜。

They won the season ___opener by a large margin.

她选择方块2作为这局纸牌游戏的开局牌。

She chose the two of diamonds as her ___opener in the card game.