The physicist's theory was so difficult that __________ （few） pe

The physicist's theory was so difficult that __________ （few） people can understand it.
【正确答案】：few
【题目解析】：此句的意思是“物理学家的理论如此复杂，很少有人能理解。”Few与可数名词连用，表示很少人，几乎没有什么人。