1. The rise and fall of each world leading powers prior to the United States is recorded in the Bible.2. Subprime mortgage defaults greatly impacted the housing market boom and bust cycle.
 the rise and fall of something boom and bustThe rise and fall of each world leading powers = 世界各強國的興衰the housing market boom and bust cycle = 房市的興衰週期
你剛剛說了甚麼? 不好意思，我放空了一下。 (請填空)
What did you just say? I am sorry. I just ost my train of thought.