If you are going to stay in the United States for longer than a(n) ______ visit, you may be interested in learning more about its people and culture.A.formalB.regularC.briefD.unexpected
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C解析本题考查形容词。句意：如果你要在美国逗留的时间比短暂访问长，您可能有兴趣了解更多它的人民和文化。brief短暂的； 简略的,简短的。