---You look sad, Kate.
---Yeah, I have made mistakes in my report.
A. a little
B. a few
C. a bit
D. a bit of
网友回答
A. a little
B. a few
C. a bit
(答案→)D. a bit of
解析：little 修饰不可数名词，few修饰可数名词复数，这两个词都含有否定意义，表是少到几乎没有。a little修饰不可数名词, a few 修饰可数名词，均表少量，少数。a bit 只能接形容词副词原级或者比较级，意思是有点儿，如果修饰名词则后面需要加上介词of。结合上文可知句意为：我在报告中犯了点错误。故选D。