group的形容词和名词形式

　　The group was considered to be a risk to national security.

　　这伙人被认为是威胁国家安全的危险分子。

　　The two groups have merged to form a new party.

　　两大组织合并组成一个新党。

　　How can we best meet the needs of all the different groups?

　　我们怎样才能最好地满足各种人的需要呢？