We have only pencils we should go to buy some .A. a few B. fewC. little

问题补充：

We have only pencils , we should go to buy some .

A. a few B. fewC. little

答案：

解析：few很少，表示否定含义，修饰可数名词复数；a few几个，表达肯定含义，修饰可数名词复数；little很少，表达否定含义，修饰不可数名词；a little一点，表达肯定含义，修饰不可数名词。句意：我们只有很少几只铅笔，我们应该去买一些。结合语境可知本句中表示否定含义，故选B。