【每日听力 • 真题系列】
Every April, Maury County 1 . Held in Columbia, Tennessee, Mule Day had its beginnings as “Breeder's Day” in the 1840s. Farmers and farm animal breeders would 2 every April 3 . This was an important business before the days of tractors, 4 and 5 . Eventually, tractors began to replace mules, 6 .
【出处:2017年6月四级听力第二套,篇章3】