Đề ôn thi Đề thi vào lớp 10 Hà Tĩnh môn Tiếng Anh - Mã đề HTI-78

Have you ever wondered how the massive buildings in our cities are made? (24) __________ and large, concrete is the main material. Mixing concrete is quite simple. First, you need cement, sand, and gravel. These are the dry ingredients. When you add water, a chemical reaction begins. This process allows the mixture (25) __________ from a liquid into a hard, durable material. The ratio of these ingredients is very important for the (26) __________ of the final product.

Once mixed, the wet concrete is poured into molds to give it a specific shape. It must be used quickly before it starts to harden. (27) __________ is why you often see large mixing trucks rushing to construction sites. Of all common building materials, concrete is one of the (28) __________ to produce, which explains its worldwide popularity. However, it's not perfect. It can crack. So, engineers often add steel bars to reinforce it. This combination provides the (29) __________ of both worlds, combining concrete’s compressive strength with steel’s flexibility.

Across the globe, a powerful movement is growing, led by young people demanding action on climate change. Inspired by international figures, Vietnam has its own 'Green Generation'. These teenagers and young adults are not waiting for the future; they are actively working to protect their environment today. They believe that small, consistent actions can lead to significant changes, proving that age is not a barrier to making a positive impact on the world.

One major area of focus for these youth-led groups is hands-on community work. Groups like the Green Youth Collective organize regular events to clean up polluted canals in big cities or plant new trees in deforested areas. They initiate these projects themselves, gathering volunteers through schools and social clubs. The goal is to create visible, immediate improvements in their local environment and inspire others to join their cause through direct participation.

Alongside these physical activities, digital activism plays an equally crucial role. Young Vietnamese environmentalists are experts at using social media platforms to raise awareness. They create engaging content, such as videos and infographics, to explain complex environmental issues in an easy-to-understand way. These online campaigns can reach thousands of people, spreading important messages far beyond their local communities and encouraging nationwide discussions about sustainability.

Ultimately, the impact of this Green Generation goes beyond just cleaner streets or more trees. Their greatest achievement is shifting mindsets. By taking action, they demonstrate to their peers and to adults that environmental protection is everyone's responsibility. They are showing that you don't need to be a government official or a scientist to contribute; you just need passion and the will to start, proving that collective small efforts create a powerful force for change.