她从钱包里掏出一叠钞票付账。

She took out a ___wad of bills from her wallet to pay the bill.

他在赌场赢了一大笔钱。

He won a ___wad of cash at the casino.

他用一团棉花堵住了漏水的水管。

He used a ___wad of cotton to stop the leaking pipe.