原题
录音 1
What does the speaker point out about nomadic people?
AInformation about them is preserved in the form of spoken stories.
BTheir numbers increased about 11,000 years ago.
CIt was difficult for them to find enough food during certain seasons.
DIt was practical for them to move in small groups.
正确答案：D
解题思路
老师暂未填写解题思路。