Đề ôn thi Đề thi vào lớp 10 Trường Phổ thông Năng khiếu môn Tiếng Anh - Mã đề PTNK-70

A concrete mixer truck is a common sight on any construction site. Its most recognizable feature is the large, pear-shaped drum mounted on its back. This part of the truck is essential for transporting liquid concrete from a factory to the place where it will be used.

This drum is not just for decoration; it is constantly rotating. The slow, continuous movement is crucial so that the concrete remains in a liquid state. If it stopped moving for too long, the mixture of cement, water, and aggregates would begin to harden, becoming solid and unusable.

The process starts with (21) __________ the raw materials into the drum. Inside, spiral blades lift and drop the materials to mix them thoroughly. This creates the wet, grey substance we know as concrete. The recipe must be precise; adding even a slightly wrong amount of water could ruin (22) __________ entire batch.

Once at the site, the process reverses. The driver changes the drum's rotation, and the blades begin to push the concrete out. It travels down a long chute to be poured exactly where needed. Getting the mixture to the right spot is not (23) __________; it requires skill and teamwork. If the concrete were placed incorrectly, it could compromise the building's safety.

The whole operation is a race against time. The foreman told his team that they (24) __________ work quickly before the concrete set. Because of this urgency, the concrete mixer truck is more than a vehicle; it's a mobile mixing plant essential for building our modern world.

It's often said that sleep is for the weak, but for teenagers, nothing could be further from the truth. Far from being a luxury, a good night's sleep is a biological necessity, a hidden superpower for your developing mind and body. Scientific research consistently shows adolescents need significantly more sleep than adults—typically 8 to 10 hours per night—to function optimally. This isn't just about feeling rested; it's when your brain processes information, consolidates memories, and prepares for new challenges. [I]

For many 14-15 year olds, the immediate impact of sleep deprivation is felt most acutely in the classroom. [II] Imagine trying to focus on complex math or remember historical dates for an exam when your brain is running on empty. A lack of sleep directly impairs cognitive functions, making it harder to concentrate, retain new information, and recall what you've learned. This means pulling an all-nighter or consistently getting less than recommended hours can undermine all your hard work. Conversely, enough sleep sharpens your mind, making you a more efficient learner.

The challenge of achieving adequate sleep is particularly acute for teenagers in many cultures, and Vietnam is no exception. Here, the widespread culture of "học thêm," or extra classes, often extends late into the evening. Students might finish regular school only to head to another learning center, sometimes not returning home until 9 or 10 PM. [III] This intense academic schedule often forces teens to choose between homework, family time, or essential rest. Discussions on popular parent forums like Webtretho often highlight this dilemma, underscoring the struggle to balance aspiration and well-being.

[IV] Beyond academics, sleep profoundly impacts your overall well-being. Sleep deprivation can significantly affect your mood, making you more irritable, anxious, or even sad. It can also weaken your immune system, making you more susceptible to illnesses. Furthermore, for many teenagers, skin health is a significant concern, and inadequate sleep can lead to breakouts and a dull complexion. Prioritizing sleep is an investment in your mental resilience, physical health, and even your appearance, enhancing confidence and social interactions.

Recognizing sleep as a powerful tool rather than a time-consuming chore is the first step towards harnessing its benefits. When you consistently get those 8-10 hours, you're not just resting; you're boosting your brainpower, stabilizing your emotions, strengthening your body, and even improving your skin. It empowers you to tackle schoolwork with greater clarity, navigate social situations with more confidence, and feel more optimistic about life. So, instead of viewing sleep as something to sacrifice, embrace it as your personal superpower—a fundamental ingredient for thriving as a teenager and beyond.