Đề ôn thi Đề thi vào lớp 10 Trường THPT Chuyên KHTN môn Tiếng Anh - Mã đề KHTN-123

When I moved into my new apartment, I was excited to decorate with houseplants. However, after just a week, my beautiful ficus tree started to look unhealthy, with its leaves turning yellow and dropping. (23) __________. (24) __________

Have you ever wondered how your smartphone screen knows exactly where you are touching it? It’s not magic, but a clever piece of technology. Most modern phones use a capacitive touchscreen, which is made up (25) __________ a grid of tiny, transparent wires that hold a constant electrical charge. Since the human body is also electrically conductive, your finger can interact with this field. (26) __________ change in the charge at a specific point is detected by the phone’s processor.

When you touch the glass, you temporarily (27) __________ the electrical field. The processor instantly identifies this disturbance and calculates its exact coordinates. (28) __________, it can execute the command you intended, like opening an app. If a phone had a different type of screen, it (29) __________ so responsive to a light touch. This is why you sometimes need special gloves; they have conductive material that allows the device to (30) __________ your touch.

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.

The rise of online shopping has introduced a major convenience: easy return policies. However, this has led to a wasteful phenomenon called 'bracketing', which is the habit of (37) __________, with the full intention of returning most of them. Shoppers feel more confident making these large purchases, (38) __________.

While this seems harmless, it has significant downsides. Many returned items are not simply put back on the shelf. This process creates a logistical challenge for retailers, (39) __________. More alarmingly, these products often cannot be resold as new and end up in landfills, (40) __________.

A. knowing they can easily send back what they don't want

B. contributing to a growing stream of packaging and transportation waste

C. ordering multiple sizes or colors of the same item

D. which increases their operational costs significantly