Đề ôn thi Đề thi vào lớp 10 Trường THPT Chuyên KHXH môn Tiếng Anh - Mã đề KHXH-119

At the vast, distant edge of our solar system lies a mysterious region known as the Oort Cloud. It is not a planet or an asteroid, but a (35) __________ that scientists use to explain the origin of certain comets. This concept, named after astronomer Jan Oort, suggests that our solar system is surrounded by an enormous, spherical shell of icy objects, far beyond the orbits of even the most distant planets and dwarf planets.

Scientists theorize that the Oort Cloud is a remnant from the formation of the solar system. The idea was first (36) __________ in 1950 to explain why new comets with very long orbits continue to appear. The cloud itself is believed to be a massive sphere of trillions of individual icy bodies. If this theory is correct, it represents the most distant and largest-scale structure of our solar system.

The sheer distance to the Oort Cloud is difficult to comprehend; it is much farther than the asteroid belt or Pluto. Due to gravitational disturbances, sometimes one of these icy objects is knocked from its position, (37) __________ its long journey toward the Sun. (38) __________, we might see one of these spectacular long-period comets from Earth, providing a rare glimpse into the materials from our solar system's beginnings.

Because it is so distant and the objects within it are so small and dark, we cannot see the Oort Cloud directly. (39) __________, its existence is based on indirect evidence from studying comet orbits. An astronomer recently (40) __________ the cloud was so faint that it would be like trying to spot a tiny piece of coal in Tokyo from San Francisco. If a probe (41) __________ that far, it would take thousands of years to arrive with current technology.

Studying the theory of the Oort Cloud is essential for understanding the complete picture of our solar system. It holds clues about the early environment in which the Earth and other planets were formed. The continued study of comets originating from this distant region is (42) __________ major key to unlocking the secrets of our cosmic neighborhood.

In early 2020, as the COVID-19 pandemic swept across the globe, Ho Chi Minh City, like many other major urban centers, entered a period of strict social distancing. While necessary for public health, these measures had a severe economic impact. Many people, especially those who earned a daily wage like street vendors and construction workers, suddenly found themselves without an income and struggling to afford basic necessities, including food. It was in this challenging environment that a remarkable and creative solution appeared on a city sidewalk: the 'gao ATM', or rice ATM.

The machine was the brainchild of Hoàng Tuấn Anh, a local entrepreneur. His invention was elegantly simple yet highly effective. People in need could approach the machine, press a button, and a dispenser would release a bag containing about 1.5 kilograms of rice into their waiting bags. The entire process was automated, requiring no direct human-to-human interaction, which was crucial for preventing the spread of the virus. A camera was installed nearby, not for surveillance, but to allow operators to see if someone needed help and to monitor the rice supply, ensuring the machine never ran empty for long.

The response was immediate and overwhelming. Lines of people, wearing masks and standing two meters apart, formed in an orderly fashion to receive their portion of rice. The story of this compassionate invention quickly gained national attention, with news outlets like VTV featuring it in their reports. Inspired by Hoàng Tuấn Anh's initiative, other individuals and organizations across Vietnam began to set up their own rice ATMs. Soon, similar rice-dispensing machines appeared in other cities like Hanoi, Hue, and Da Nang. They too wanted to support their local communities in a safe and dignified manner, proving that a good idea could spread just as fast as the virus it was designed to fight.

What made the rice ATM so special was not just the free food, but the philosophy behind it. Hoàng Tuấn Anh explained that he wanted to ensure that people could receive help without feeling like they were losing their dignity. The automated nature of the machine meant there was no need to ask anyone for help directly. It was a system built on trust and respect. This act of practical kindness demonstrated a deep compassion for fellow citizens, reinforcing the strong sense of community and solidarity that Vietnam is known for, especially during difficult times.

Ultimately, the rice ATM became more than just a food distribution system. It transformed into a powerful national symbol of innovation, resilience, and unity. It showed the world, and especially young Vietnamese, that one person's empathy and practical problem-solving skills could spark a nationwide movement of kindness, providing not only nourishment for the body but also hope for the spirit.