根据听到的对话，回答题：What is the main purpose of the lecture?-考呗网题库移动版

不定项选择题根据听到的对话，回答题：
What is the main purpose of the lecture?

参考答案D

解析:

不定项选择题What is probably true about the origins of agriculture?

不定项选择题The professor explains how the early people of Mexico probably started farming． Summarize the process by putting the events in order．

不定项选择题Why did the people begin to use digging sticks?