Question

There was           time           Iraq was one of the strongest countries in the world

1. A.
   a；when
2. B.
   a；that
3. C.
   the；that
4. D.
   the；when

Answer 1

A
考查定语从句。此定语从句为固定句型：There was a time when ，曾经有一段时间，曾经有一段时间伊朗是世界上最强大的国家之一。所以选A。