企源知识库

The policy of containment of Communism led the U.S. into the war in _____ which turned out to be the longest war it fought.
A、Korea
B、Congo
C、Greece
D、Vietnam
【正确答案】：D
【题目解析】：对共产党的遏制政策使美国卷入了越南战争，美国打的时间最长的一场战争。