1. 开头：In today's society, people are facing many challenges.

结尾：In conclusion, we should take action to overcome these challenges and create a better future.

2. 开头：As the saying goes, \"Time is money.\"

结尾：In short, time management is crucial for success in all aspects of life.

3. 开头：Education is the key to success.

结尾：In summary, education is not only important for personal growth but also for the progress of society.

4. 开头：Global warming has become a pressing issue in recent years.

结尾：To sum up, it is our responsibility to take action and protect our planet for future generations.

5. 开头：Technology has revolutionized the way we live and work.

结尾：In conclusion, we must use technology wisely and ethically to ensure a better future for all.