✨ คำตอบที่ดีที่สุด ✨
一通り目を通してみました
少し手を加えてありますので参考にしてください
1 This skirt is 10% cheaper than usual. I will take it.
2 The current world population is about four times as large as it was 100 years ago.
3 Oil has played one of the most important roles in human lives.
4 Dr. Tanaka found that the ruins were much older than he had thought.
5 Because of the spread of e-mail, people write letters less often than they used to.
丁寧な回答ありがとうございます!
非常に助かりました!🙇♂️✨