Đề ôn thi Đề thi vào lớp 10 Hà Tĩnh môn Tiếng Anh - Mã đề HTI-128

Have you ever tried to listen to music on a noisy bus? Noise-cancelling headphones are a popular solution for (24) __________ noisy situations. Instead of just blocking sound physically like regular earmuffs, they use advanced technology to actively (25) __________ unwanted ambient noise. This technology makes travelling or working in loud places much more pleasant.

The magic relies (26) __________ a tiny microphone on the outside of the headphone. This microphone 'listens' to the surrounding noise and sends the soundwave data to a special processing chip. This chip instantly creates an opposite soundwave – a sort of 'anti-noise'. (27) __________, when the anti-noise wave meets the original noise wave, they cancel each other out before reaching your ear. The result is a significant reduction in background noise, which has a positive (28) __________ on your listening experience. If this technology didn’t exist, listening to audio clearly in public (29) __________ much more difficult.

Can you imagine waiting five minutes for a single song to download? For your parents, this was normal. Before today's lightning-fast internet, connections were slow and unreliable. Now, for teenagers in Vietnam and across the world, high-speed internet is essential for studying, gaming, and streaming videos. This massive change didn't happen overnight; it was the result of an incredible technological journey that transformed how we connect to the digital world.

In the past, most homes connected to the internet using dial-up or ADSL technology, which sent data through old copper telephone lines. This system was slow and had many limitations. For example, you couldn't use the house phone and the internet at the same time. As more people started using the internet for complex tasks, this copper-wire system quickly became obsolete and unable to meet the growing demand for faster speeds.

The solution was fiber optic technology. Instead of sending electrical signals through copper, fiber optic cables use thin strands of glass to transmit data as pulses of light. Because light travels so fast, this method is significantly quicker and more stable. Fiber optic technology is a superior way to deliver internet, as it can handle massive amounts of data without losing speed. This innovation is the primary reason you can watch high-definition movies without any buffering.

In Vietnam, this digital transformation has been remarkable. Companies like FPT Telecom and VNPT have worked hard to replace the old copper infrastructure with modern fiber optic networks, even in remote areas. This nationwide effort has provided millions of young Vietnamese people with the powerful tools they need to learn, create, and connect with the world, all made possible by tiny strands of glass carrying light.