◎ 题干
Scientists have many theories about how the universe ____ into being.    
[     ]
A. came                              
B. was coming   
C. had come                          
D. would come
◎ 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“Scientists have many theories about how theuniverse____ into being.[ ]A. came B. was comingC. had comeD. would come…”主要考查了你对  【一般过去时】  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。