we want to make sure they have got __necessary__to succeed in the task.1a few\knowledge2a\knowledge3many\knowledges4the\knowledge5those\knowledges这道题选什么啊,为什么
问题描述：
we want to make sure they have got __necessary__to succeed in the task.
1a few\knowledge
2a\knowledge
3many\knowledges
4the\knowledge
5those\knowledges
这道题选什么啊,为什么
答
4the\knowledge 这里是特指,我们希望确定 他们已经掌握能成功做成这件任务的必要知识.