biscuit前用a還是some

biscuit是單數，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.'諾拉抱起那個男孩，給他一塊餅乾，說：“倫尼，給，拿著這塊好吃的餅乾。”

2、I'm going to call their corporate office... Son of a biscuit!我要打去他們公司總部投訴…去他個小餅乾！