Scientists have many theories about how the universeinto being.A. cameB. was comingC. had

问题补充：

Scientists have many theories about how the universeinto 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。宇宙的形成是过去发生的事情，故使用一般过去时。句意：科学家们有很多关于宇宙是如何形成的理论。根据句意说明A正确。