问题
单项选择题
In the primary cooperation ______
A．group and individual don't have to unite
B．the group contains nearly all of each person's life
C．individuals work for themselves
D．people don't value cooperation
答案
参考答案：B
解析：[分析] 细节题型。 见第二段第一句及第二句：In the first form，known as primary cooperation，group and individual unite．The group contains nearly all of each individual's life．