biscuit前用a还是some

biscuit是单数，前面用a，例如：

1、Nora picked up the boy， and gave him a biscuit. 'There you are， Lennie， you take the nice biscuit.'诺拉抱起那个男孩，给他一块饼干，说：“伦尼，给，拿着这块好吃的饼干。”

2、I'm going to call their corporate office... Son of a biscuit!我要打去他们公司总部投诉…去他个小饼干！