◎ 题干
Discovery in a South African cave suggests that modern human behavior ____ much earlierthan ____.
A.begin, previously thoughtB.began, previously thought
C.should begin, previous thinkingD.began, previous thinking
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“Discovery in a South African cave suggests that modern human behavior ____ much earlierthan ____.A.begin, previously thoughtB.began, previously thoughtC.should …”主要考查了你对  【现在分词的被动式】【现在分词】【不定式的被动式】【过去分词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。