Answer:
Once when preparing for a Spanish test I used repetition to help me study. This technique was useful for me, because when I wrote out vocabulary words and continued to review them until the day of the test it helped me remember the words a lot easier.
I believe that the first choice is the correct one
He requested a wagon or chariot (I believe).
By 334 BC there were 7 warring states: Qin, Chu, Zhao, Wei, Han, Yan, and Qi. The Warring States Period ended with Qin's conquest of the other states. It was succeeded by the Qin Dynasty in 221 BC, which marked the transition between ancient China and Imperial China.