Complete the following sentence with a (compound) word derived from the one(s) given in bracket.
There are no （ ） allies and enemies among countries. National interest is constantly uniting or dividing nations.(ever, last)
【正确答案】：EVER-LASTING
【题目解析】：
根据前文no，后文allies名词可知，空格处应该填形容词，形容词修饰名词，ever永远，last持续，可以组成合成词ever-lasting永恒的，且符合句意。句意：各国之间没有持久的盟友和敌人。国家利益在各个国家不断地结合或分割。