Đề ôn thi Đề thi vào lớp 10 Trường THPT Chuyên KHTN môn Tiếng Anh - Mã đề KHTN-87

(23) __________ This process allows your body to gradually transition from a state of exertion back to a state of rest. A complete cool-down typically involves two main phases. (24) __________

In every ecosystem, from forests to your own garden, there's a special group of living things called decomposers. These organisms, (25) __________ bacteria and fungi, have a very important job. When plants and animals die, their bodies contain stored energy and nutrients. So, what happens to all this dead material? It doesn't just disappear. Instead, it (26) __________ down by decomposers. This process is called decomposition. The nutrients, (27) __________ are essential for life, are then released back into the soil, water, and air. This recycling of nutrients plays a (28) __________ role in maintaining the health of the ecosystem. Think about a fallen leaf in autumn. Over time, decomposers get to work. By the time spring (29) __________, much of that leaf has become part of the soil again, ready to help new plants grow. Without decomposers, our planet would be covered in dead things, and the (30) __________ nutrients needed for new life would be locked away forever.

In many urban areas, like Ho Chi Minh City, canals that should be beautiful waterways are often choked with plastic bags, foam boxes, and other trash. For a long time, many citizens believed that cleaning up this pollution was solely the government's responsibility. However, a new wave of environmentalism is rising, led by ordinary people who are tired of waiting for change and have decided to take direct action themselves.

A prominent example of this movement is the group 'Sài Gòn Xanh' (Green Saigon). Armed with nets, rakes, and a strong sense of purpose, these young volunteers wade into heavily polluted canals to pull out garbage. Their dedication is clear as they document their hard work through photos and videos on social media. This online presence does more than just show their progress; it acts as a powerful call to action, inspiring countless others across the country to join or form their own local cleanup groups.

The impact of these groups is immediately visible. A canal that was once black with waste can look remarkably cleaner after just one session. This raises public awareness about the severity of pollution. However, some critics argue that these clean-ups offer only a temporary solution. Without systemic changes to waste management and laws to prevent littering, the trash often returns quickly, meaning the volunteers' hard work must be repeated constantly.

Despite these challenges, the story of groups like 'Sài Gòn Xanh' carries an important message. It demonstrates that you do not need to be a powerful official or a famous scientist to make a positive impact on your environment. The collective effort of dedicated individuals proves that small, consistent actions can create visible change and, more importantly, foster a stronger sense of community responsibility for the planet.

In our modern world, we often associate bright city lights with safety and progress. Streetlights illuminate dark corners, and glowing buildings create a sense of security after sunset. (37) __________.

This artificial glow seriously disrupts the natural world. For instance, nocturnal animals like bats rely on darkness to hunt, but city lights can confuse them and affect their ability to find food. (38) __________. They use the moon and stars for navigation, but artificial lights can lead them astray, causing them to fly into buildings.

Even sea turtles are at risk. Newly hatched turtles instinctively move towards the brightest light, which should be the moon reflecting on the ocean. (39) __________. This misdirection can lead to the loss of entire generations of these vulnerable creatures. (40) __________.

A. Migratory birds are another major victim of this urban brightness

B. Ultimately, our quest for human safety creates unforeseen dangers for the animal kingdom

C. However, this constant illumination has a dark side known as light pollution

D. Instead, they are often fatally drawn towards illuminated streets and buildings near the coast