Analyzing the previous rounds, I noticed that in the even rounds (rounds 4 and 6), the opponent played paper (round 4: paper, round 6: paper). In contrast, in the odd rounds after round 3 (rounds 3, 5, 7), the opponent played rock. With this alternating pattern emerging, it's likely that in round 8 (an even round), the opponent may choose paper again. Since scissors beats paper, my best response is to play scissors.