Question

S cientists have many theories about how the universe________into being

1. A.
   came
2. B.
   was coming
3. C.
   had come
4. D.
   would come

Answer 1

A
這題考查時(shí)態(tài)用法：句意是：科學(xué)家有很多理論關(guān)于宇宙是怎么形成的。宇宙是過去形成的，所以用過去式，選A。