The end of the long ______ rivalry opened a new era in the histo

The end of the long ______ rivalry opened a new era in the history of not only the United States but also the rest of the world.
A、Cold War
B、World War I
C、civil war
D、Vietnam War
【正确答案】：A
【题目解析】：The end of the long Cold War rivalry opened a new era in the history of not only the United States but also the rest of the world.参见教材P225。