Fast fashion is a major cause of (1) ______ pollution today. It encourages people to buy cheap clothes and throw them away quickly. Many of these clothes are made from plastic materials, (2) ______ they do not break down easily. They can stay in the environment for hundreds of years. In addition, washing these clothes can (3) ______ tiny plastic pieces into rivers and oceans. These small pieces are harmful to fish and other sea animals. To reduce this problem, we should buy fewer clothes and choose better quality items. We can also reuse or donate old clothes to people (4) ______ need. By doing so, we can help (5) ______ the environment and build a greener future.

1. In traditional schools, one teacher usually had to manage a large class of thirty or forty students. Because everyone learns at a different speed, it was difficult for the teacher to help every child individually. Students often followed the same lessons and did the same tasks. Therefore, some of them felt bored, while others found the lessons too difficult.

2. To solve these problems, modern schools are introducing educational robots as helpful tutors. These robots can support students by giving simple explanations and extra practice. They can work with each student at a suitable speed. Unlike humans, robots never get tired, so they repeat an explanation many times. They can also use interactive games to make lessons more exciting. These machines help students become more confident and interested in learning. Teachers can also have more time to prepare lessons and help students with difficult problems. With these benefits, robots will play an important role in education.