【听力原文】
[ 19 ] Corn was one food that dominated the food-growing activities of those early American Indian tribes that relied on farming for food. The early farmers, or the American Indians, planted lots of varieties of corn, including the kind of corn that we eat today as popcorn. The corn was prepared in different ways. It could be eaten fresh from the field; sometimes it was boiled; sometimes the corn was roasted or parched. [20] Bat most of the corn was dried on the cob, and later it was ground into flour. The advantage of this method was that the dried corn could be stored for long periods of time without spoiling. The American Indians harvested the corns twice, the first harvest was the green corn or sweet corn harvest. This harvest was accompanied by a ceremony of thanks giving. The farmers thought that this celebration would protect the farmers from disaster. The final harvesting of the ripe corn and the harvest ceremony took place about six weeks later. During this harvesting, the farmers pulled back the husks of corn and braided them together. Big bundles were prepared this way and were dried for use later on throughout the winter. [ 21 ] After the corn was eaten, these farmers used the dried husks to make all sorts of different things like mats, moccasins ( 软拖鞋 ), dolls and ceremonial masks.
What is the main subject of this talk?
【解题思路1四项均为名词短语，虽有三项都提及corn，但各个选项相互之间关联度不高，又由5-*-题为该短文的第一题，因此很有可能考查短文的主题。
【解析1短文第一句说道： “玉米是早期的美洲印第安部落主要依赖的一种农作物”，接下来短文介绍了印第安人如何食用和储存玉米，一年收获几次，玉米皮还可以用来做什么等等。因此选项A‘‘美洲印第安人与玉米”最好地概括了短文主题。