Question

Scientists have many theories about how the universe_____.

A．came into being	B．was coming into being
C．had come into being	D．would come into being

Answer 1

A

考察时态。根据句意可知宇宙的形成是过去发生的，使用过去时。句意：关于宇宙是如何形成的，科学家有很多的理论。