Scientists have many theories about how the universe into being.A. cameB. was comingC. ha

问题补充：

Scientists have many theories about how the universe into being.

A. came

B. was coming

C. had come

D. would come

答案：

(答案→)A. came

B. was coming

C. had come

D. would come

解析：考查时态的用法。宇宙是如何形成的，因为宇宙的形成这个动作已经发生，所以用一般过去时来表示已经发生的动作。