参考答案

正确答案：Americans
Americans 解析：根据题干关键词friendship，changes，intensity，move，marry，discover new Interests定位到原文 German friendship下最后两句：Young Germans who come to the United States have great difficulty in establishing such friendships with Americans．We view friendship more tentatively，subject to changes in intensity as people move，change their jobs，marry，or discover new interests．虽然最后一句主语是“我们”，但前一句说到美国来的德国青年发现很难与美国人建立这样的朋友关系，据此推知本句中的“我们”指的是“美国人”。