单选题 Human evolution is a lengthy process of change______people originated from apelike ancestors. Scientific evidence shows that the physical and behavioral traits shared by all people evolved over a period of at least 6 million years.(浙江大学2010年试题)
【正确答案】 B
【答案解析】解析：本题考查关系代词which和常用介词的搭配。of表示“所属”；by表示“方式”；for表示“目的”；that不能引导非限制性定语从句。所以，正确答案是B。