听力原文： At 4:30 in the morning on April 12, 1861, the only war between the south and the north in the history of the United States began: After the first shot had been fired, there was no turning back. At the beginning, the South won most of the wars, but by the summer of 1863, the wars had turned in favor of the Northern forces. On April 9, 1865, the leaders of the Southern army gave in to the Northern army, and the four terrible years of fighting were over. At 4:30 in the morning on April 12, 1861, the only war between the south and the north in the【11】of the United States began. After the first【12】had been fired, there was no turning back.【13】, the South won most of the wars, but by the summer of 1863, the wars had turned【14】the Northern forces. On April 9, 1865, the leaders of the Southern army gave in to the Northern army, and the four terrible years of【15】were over.