Đề ôn thi Đề thi vào lớp 10 Trường THPT Chuyên KHXH môn Tiếng Anh - Mã đề KHXH-138

Road signs are essential for managing traffic and ensuring everyone's safety on the road. They are a visual language that communicates rules, warnings, and information to drivers and pedestrians. Following these signs is not just a suggestion; it's a legal requirement (35) __________ everyone on the road.

One of the most common categories is the warning sign. These are usually triangular with a red border. When you see one, you must slow down and (36) __________ attention to the road ahead. They alert you to potential dangers, such as a sharp curve, a slippery road, or an area where animals might cross.

Another important type is the prohibition sign. These signs are typically circular and also have a red border. They tell you what you mustn't do. For instance, a 'No Entry' sign means you can't enter that street. They often contain a symbol (37) __________ clearly illustrates the forbidden action, like no U-turns or no parking.

Prohibition signs, (38) __________ main function is to set limits, are different from mandatory signs. Mandatory signs are also circular, but usually blue, and they tell you what you must do, such as 'Turn Left Only'. (39) __________ driver must follow these instructions. In contrast, rectangular signs are informational. They provide (40) __________ information like the distance to the next city or the location of a hospital.

These signs don't give orders. (41) __________, they help you plan your journey and find services. Ultimately, understanding the different shapes, colors, and symbols is crucial for safe driving. By recognizing and obeying these visual instructions, many accidents can be (42) __________, making the roads safer for all of us.

Rivers have always been the lifelines of civilizations, providing water for drinking, agriculture, and transport. They are vibrant ecosystems, home to countless species of plants and animals. However, many of the world's rivers are facing a silent crisis: pollution. Day after day, a dangerous mix of industrial discharge, agricultural runoff containing pesticides, and tons of plastic waste finds its way into these vital waterways, threatening the delicate balance of nature and the health of human communities that depend on them.

In Vietnam, this global issue has a very local face. Hanoi's To Lich River, for example, is a notorious case. While historical accounts describe it as a clear, poetic river that was a source of pride for the city's inhabitants, today it is known for its dark, polluted water and unpleasant smell. Once a symbol of the city's charm, it now represents a significant environmental challenge, prompting numerous discussions about restoration projects and the cost of urban development.

The consequences of such contamination are severe. Pollutants like heavy metals from factories and harmful bacteria from untreated sewage create a toxic environment. These substances harm aquatic life, leading to the death of fish and other organisms, which disrupts the entire food chain. For local communities, the effects are just as alarming. Using or coming into contact with contaminated water can lead to serious health problems, while the decline of fish populations can destroy the livelihoods of fishermen who have relied on the river for generations.

Tackling river pollution is a complex and challenging task. Governments and local authorities often initiate large-scale cleanup projects, which can involve dredging riverbeds and building advanced water treatment facilities. However, these projects are frequently expensive and slow to implement. Experts agree that technology and government policies alone are not enough. Real, lasting change requires community participation. Simple actions, when performed by many, can have a powerful impact. Reducing our use of single-use plastics, disposing of waste properly, and raising awareness are all crucial steps.

Ultimately, the health of our rivers is a mirror reflecting the health of our society. Their revival depends not just on ambitious projects, but on the collective will and shared responsibility of every citizen. For young people, understanding the state of your local river is the first step toward becoming an active participant in its protection. It's about securing a healthier, more sustainable environment for your own future and for generations to come.