填空题 By saying "Indeed, many of the things we think of as '100 percent American' came from other cultures" (Line 3, Para.1), the author suggests that the American culture is 1.

1、

【正确答案】 1、not immune to other cultural influences

【答案解析】本题空白处问“作者说‘Indeed，many of the things we think of as '100 percent American' came from other cultures．'意指美国文化如何”。本段开头提到美国文化并非不受其它文化的影响。接着举了一些例子论证。最后总结说"many of the things we think of as‘100 percent American’．came from other cultures"(许多我们认为是“100%纯美同”的事物却来自不同的文化)，这些都证明了段首的观点，即：美国文化并非不受其它文化的影响。因此，空白处应该填not immune to other cultural influences。