Đề ôn thi Đề thi vào lớp 10 Trường THPT Chuyên KHTN môn Tiếng Anh - Mã đề KHTN-29

(23) __________ This journey from stranger to trusted neighbor doesn't happen overnight. (24) __________

An excavator's arm is a marvel of engineering, capable of powerful and precise movements. It consists of three main sections: the boom (the part closest to the cab), the stick (also called the dipper arm), and the bucket at the very end. (25) __________ of these parts is moved by large hydraulic cylinders. The basic operating (26) __________ behind this amazing strength is Pascal's Law applied to fluid dynamics. An operator in the cab controls the flow of special oil to pistons. This pressurized fluid is what allows the machine to (27) __________ difficult tasks like digging trenches and lifting heavy materials with surprising accuracy.

The force generated is truly immense. If an excavator’s arm were not hydraulic, it (28) __________ have nearly enough strength to lift tons of rock or soil. The hydraulic system multiplies the operator’s force significantly. (29) __________, even small movements of the control levers result in massive power at the bucket. The entire system is connected (30) __________ a network of reinforced hoses designed to withstand incredibly high pressure, making it a perfect example of applied physics on the construction site.

Across Vietnam's cities, from Ho Chi Minh to Hanoi, a new trend is taking hold among young people: gym culture. Fitness centers are opening everywhere, promising a modern path to health and a strong body. For many teenagers, seeing older friends or siblings join a gym raises an important question: is this the right choice for me, or just a popular trend?

The appeal of gyms is clear. They offer a controlled environment with a wide variety of advanced equipment. Members can follow structured workout plans designed by professionals, which helps ensure they exercise safely and effectively. Having access to personal trainers and group classes can also provide motivation and guidance, which is especially helpful for those just starting their fitness journey.

However, the gym environment isn't for everyone. The monthly cost can be a barrier for some students. For others, a room full of experienced lifters can feel intimidating and discouraging. The routine of lifting weights or running on a treadmill can also become repetitive, leading to a loss of motivation over time compared to the dynamic nature of team sports or dancing.

Ultimately, the best form of exercise is a personal decision. While gyms offer significant benefits, they are not the only path to being fit. The key is to find an activity you genuinely enjoy, whether it’s kicking a football, learning a new dance, or cycling outdoors. Consistent activity, driven by enjoyment, is far more valuable than forcing yourself to follow a trend you don't love.

The Global Positioning System, or GPS, is a technology we often take for granted for daily tasks like finding a coffee shop. However, its journey began in a very different world. (37) __________. For decades, its primary function was to give American armed forces a strategic advantage.

In the 1980s, the U.S. government decided to open the system for civilian use. (38) __________. From car sat-navs to fitness trackers, GPS quickly became essential. Yet, its most surprising impact might be on our social lives. (39) __________. This application shows just how far the technology has come from its original purpose. (40) __________.

A. Thus, a tool designed for conflict has unexpectedly become a tool for connection

B. It was initially developed by the U.S. Department of Defense as a highly precise navigation tool for military operations

C. This decision transformed society by creating a new era of personal and commercial navigation

D. Dating apps, for instance, use this location data to suggest potential partners nearby