Đề ôn thi Đề thi vào lớp 10 Phú Thọ môn Tiếng Anh - Mã đề PTH-96

Bluetooth is a wireless technology that allows devices like smartphones, headphones, and speakers to communicate with each other over short distances. It helps us to (15) __________ information such as photos, music, and documents without using any cables. The technology creates a wireless personal area network, or 'piconet'. This provides a secure and reliable (16) __________ between two or more devices, making our digital lives much more convenient.

Before devices can exchange data, they need (17) __________ with each other. One device, like your phone, scans for other nearby Bluetooth devices. When it finds your headphones, for example, it sends a request to connect, and the headphones accept. (18) __________ creates a trusted link between them, so they can automatically connect in the future. Using Bluetooth is one of the (19) __________ ways to link gadgets, as it doesn't require an internet connection and uses very little power.

For many people, connecting their phone to their car or headphones using Bluetooth has become (20) __________. It is a simple, effective technology that has truly changed how we interact with our electronics.

In many urban areas, like Ho Chi Minh City, canals that should be beautiful waterways are often choked with plastic bags, foam boxes, and other trash. For a long time, many citizens believed that cleaning up this pollution was solely the government's responsibility. However, a new wave of environmentalism is rising, led by ordinary people who are tired of waiting for change and have decided to take direct action themselves.

A prominent example of this movement is the group 'Sài Gòn Xanh' (Green Saigon). Armed with nets, rakes, and a strong sense of purpose, these young volunteers wade into heavily polluted canals to pull out garbage. Their dedication is clear as they document their hard work through photos and videos on social media. This online presence does more than just show their progress; it acts as a powerful call to action, inspiring countless others across the country to join or form their own local cleanup groups.

The impact of these groups is immediately visible. A canal that was once black with waste can look remarkably cleaner after just one session. This raises public awareness about the severity of pollution. However, some critics argue that these clean-ups offer only a temporary solution. Without systemic changes to waste management and laws to prevent littering, the trash often returns quickly, meaning the volunteers' hard work must be repeated constantly.

Despite these challenges, the story of groups like 'Sài Gòn Xanh' carries an important message. It demonstrates that you do not need to be a powerful official or a famous scientist to make a positive impact on your environment. The collective effort of dedicated individuals proves that small, consistent actions can create visible change and, more importantly, foster a stronger sense of community responsibility for the planet.