Đề ôn thi Đề thi vào lớp 10 Hà Nội môn Tiếng Anh - Mã đề HN-65

(23) __________ This principle operates on a "first-come, first-served" basis, which has several profound implications for social harmony. (24) __________

Comets are often called 'dirty snowballs', traveling through space on long, elliptical orbits. For most of their journey, they are frozen and inactive, far from the sun's warmth. However, as a comet approaches the sun, it begins its (25) __________ transformation. The sun's heat causes the ice to vaporize, creating a glowing cloud called a coma. This cloud, along with dust particles, forms magnificent tails that can stretch for millions of kilometers. (26) __________ makes comets one of the most beautiful sights in the night sky.

Spotting a famous comet like Halley's is an event that happens only (27) __________, as it appears about every 76 years. People around the world stop what they are doing to try (28) __________ a glimpse of it. The closer it gets to the sun, the brighter and (29) __________ spectacular its tail becomes. After passing the sun, the comet begins its long, slow journey back to the outer solar system, where it will wait for years before it can (30) __________ another appearance.

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.

The traditional family dinner, once a cornerstone of daily life, is facing a modern challenge: the rise of food delivery apps. These platforms offer an unparalleled level of convenience, (37) __________. While this convenience is celebrated, it also introduces subtle changes to family dynamics.

For example, instead of sharing one home-cooked meal, each family member might choose their own individual dish, (38) __________. Furthermore, the constant availability of takeout can reduce opportunities for parents and children to cook together, (39) __________. This shift isn't necessarily negative, but it does represent a significant change, (40) __________.

A. leading to less shared experience and conversation around the dinner table

B. prompting us to reconsider what the modern family meal looks like

C. which has long been a way to pass down family recipes and skills

D. allowing families to order diverse meals with just a few taps on their smartphones