Đề ôn thi Đề thi vào lớp 10 Hà Tĩnh môn Tiếng Anh - Mã đề HTI-123

Using a modern subway system is a fast and efficient way to travel in a big city. The process might seem complicated. (24) __________, it is actually quite simple. First, you need to purchase a ticket from an automated machine. Access to the platform area is then only (25) __________ after you tap your ticket at the electronic gate. These gates open automatically. Once on the platform, it is important to check the electronic screens for crucial information. They show the train's final (26) __________ and when it is expected.

When the train finally (27) __________, you should always stand back from the doors and allow passengers to exit first. This is considered polite etiquette. After they have cleared the doorway, you can safely (28) __________ the train. Remember to wait behind the yellow line, a safety feature (29) __________ is found in almost every subway station worldwide. Following these steps ensures a smooth and safe journey for everyone.

Originally from South America, the Golden Apple Snail (GAS) was introduced to Asia, including Vietnam, in the 1980s. People initially thought it could be a valuable food source for farmers. However, this seemingly good idea quickly became a significant environmental and agricultural challenge. Snails that escaped or were released into the wild found the warm, wet conditions of rice paddies to be a perfect new home, leading to severe consequences.

The primary issue with the GAS is its diet. These snails have a strong preference for young rice seedlings, which are essential for a successful harvest. A large population can destroy a rice field in a short time, threatening farmers' livelihoods. Furthermore, these creatures reproduce rapidly, laying bright pink egg clusters on plants above water. Each cluster contains hundreds of eggs, allowing their numbers to explode and spread quickly.

The impact of this invasive species is twofold. Economically, it causes major losses for the rice industry, a key part of Vietnam's economy. Environmentally, the snail disrupts the natural balance of the paddy ecosystem. Because the GAS is so harmful to crops, government bodies like the Plant Protection Department work on methods to manage its population. This includes encouraging farmers to collect the snails and their eggs manually.

The story of the Golden Apple Snail is a powerful lesson about invasive species. It shows how introducing a non-native animal, even with good intentions, can create a huge and costly problem. This case reminds us of the delicate balance in our local ecosystems and why we must protect them. It highlights how one environmental change can affect the food we eat and the people who grow it.