题目解析：
【题目翻译】根据第2段，以下哪项陈述对早期农民是正确的？
A他们用农业补充其他食物来源。
B他们被赶出了小社区。
C他们是洪水的受害者。
D他们一次种了几块地。
【判定题型】：题目问的是文章中的具体细节信息，故根据题目问法可以判断本题为事实信息题。
【关键词定位】根据关键词“early farmers”,定位到Passage 2第3句，原句为“The first farmers, who may have lived as long as 10,000 years ago, undoubtedly used simple techniques and still relied primarily on other forms of food production, such as hunting, foraging, or pastoralism. ”，意思是“出现在10,000 年前的最早的农民，毫无疑问地使用着简单的技术，并且仍主要依赖着其他的食物生产方式，比如狩猎，觅食或放牧。”
【逻辑分析】先看题干问关于“farmer”，是什么时期的农民，“early” farmer （整段都跟farmer有关，找farmer必然是找不到的，直接找“early” farmer以节约时间）
【选项分析】
A.与文章相符。The firstfarmers, who.. lived 1000 ago... undoubtedly used simple.. and stillrelied primarily on ”other forms of food production” = “other food sources” 所以，选A 。
B.文章未提到他们被赶走了，故错误。
C.文章未提及，故错误。
D.文章未提及，故错误。
The exact time and place that crops were first cultivated successfully is uncertain. Many prehistorians believe that farming may have emerged in dependently in several different areas of the world when small communities, driven by increasing population and a decline in available food resources, began to plant seeds in the ground in an effort to guarantee their survival. The first farmers, who may have lived as long as 10,000 years ago, undoubtedly used simple techniques and still relied primarily on other forms of food production, such as hunting, foraging, or pastoralism. The real breakthrough took place when farmers began to cultivate crops along the floodplains of river systems. The advantage was that crops grown in such areas were not as dependent on rainfall and therefore produced a more reliable harvest. An additional benefit was that the sediment carried by the river waters deposited nutrients in the soil, thus enabling the farmer to cultivate a single plot of ground for many years without moving to a new location. Thus, the first truly sedentary (that is, nonmigratory) societies were born. As time went on, such communities gradually learned how to direct the flow of water to enhance the productive capacity of the land, while the introduction of the iron plow eventually led to the cultivation of heavy soils not previously susceptible to agriculture.
