单项选择题

阅读下面短文，从短文后所给各题的四个选项([A]、[B]、[C]和[D])中选出能填入相应空白处的最佳选项。

The celebration of Veterans Day is held on November 11th every year in the United States. This day is set (36) to honor and remember the (37) men and women who have (38) their country, in any war and (39) peacetime. Veterans Day was first (40) Armistice Day. That day (41) the end of World War I. Thirty-five countries (42) in that war. An armistice was (43) on the eleventh hour of the eleventh day of the eleventh month, and this (44) the war was over. Many countries were (45) to hear that the war was over and that their soldiers would be coming home. An (46) American soldier was buried in Arlington National Cemetery (47) a hillside overlooking the Potomac River at 11:00 a.m. on November 11, 1921. His (48) is called the "Tomb of the Unknown Soldier". The (49) of the tomb is where the U.S. government (50) its annual Veterans Day (51) . On the same day, a soldier from France and a soldier from England were (52) also buried in their (53) countries, to give special (54) to the end of the war. In 1954, the U.S. Congress changed the name of the day (55) Armistice Day to Veterans Day.