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The United States government declared war on Germany on _____.
A、April 6, 1917
B、January 18, 1919
C、August 4, 1914
D、April 6, 1917
【正确答案】：D
【题目解析】：
答案选D。The United States government declared war on Germany on April 6, 1917.参见教材P209。