Đề ôn thiĐề thi vào lớp 10 Hà Nội môn Tiếng Anh- Mã đề HN-119

The Evolution of Computers

Early computers were massive machines, often taking up entire rooms. They were primarily used for (21) __________ like complex calculations, and very few people had access to them. These early computers were (22) __________ to operate, requiring specialized knowledge and training.

Over time, computers have become significantly smaller, faster, and more user-friendly. The development of the internet and personal computers has (23) __________ transformed how we live, work, and communicate. Today, computers are used in almost every aspect of our lives, from (24) __________ our finances to entertainment and social connection. They have become an (25) __________ tool for learning, connecting, and exploring the world around us. However, it is important to use them responsibly and be aware of the (26) __________ impact they can have on our health and well-being.

The search for extraterrestrial life, often shortened to SETI, captivates the imagination and fuels scientific exploration. While we haven't found definitive proof of alien life yet, scientists focus on finding potentially habitable planets outside our solar system, known as exoplanets. These planets share key characteristics with Earth, making them promising candidates for hosting life as we know it.

One important factor is the presence of liquid water. Just like on Earth, water is crucial for life to thrive. Scientists look for exoplanets located within the "habitable zone" of their star - a region where temperatures allow liquid water to exist on the planet's surface. This zone is neither too hot, causing water to evaporate, nor too cold, freezing it into ice.

Another vital aspect is the planet's atmosphere. A suitable atmosphere protects life from harmful radiation from its star and provides the necessary pressure and gases for life to exist. For example, Earth's atmosphere shields us from the Sun's radiation and contains gases like oxygen, essential for our survival.

While finding an Earth-like planet is a significant step, it doesn't guarantee the presence of life. However, by identifying exoplanets with these key characteristics, scientists increase the chances of discovering signs of extraterrestrial life, potentially answering the age-old question: Are we alone in the universe?

Coral reefs are often called "the rainforests of the sea" due to their incredible biodiversity. (37) __________, they are underwater ecosystems teeming with life, providing a home to a quarter of all marine species. Found in warm, shallow waters, coral reefs are formed by tiny animals called polyps, which secrete calcium carbonate skeletons.

(38) __________. These structures grow slowly over time, creating intricate formations that support a dazzling array of fish, invertebrates, and algae. The health of coral reefs is vital, as they protect coastlines from erosion and storms, provide food and livelihoods for millions of people, and offer opportunities for tourism and recreation.

However, these underwater cities are facing numerous threats. Climate change is (39) __________, causing ocean acidification and coral bleaching, which weaken and kill corals. Pollution from land-based activities, such as agriculture and coastal development, also damages coral reefs.

(40) __________. By reducing our carbon footprint, supporting sustainable fishing practices, and advocating for responsible coastal development, we can all contribute to the preservation of these awe-inspiring ecosystems for generations to come.

A. considered the most significant danger

B. It is crucial to take action now to protect coral reefs

C. Over time, these skeletons accumulate

D. Just like their terrestrial counterparts