Đề ôn thi Đề thi vào lớp 10 Trường Phổ thông Năng khiếu môn Tiếng Anh - Mã đề PTNK-165

A sandstorm is a powerful natural event, most common in arid and semi-arid regions. It begins when strong winds blow across dry, loose land with very little vegetation to hold the soil in place. These storms, also known as haboobs, can appear suddenly and are a dramatic display of nature's force. The key ingredients are simple: strong wind and a large amount of dry sand or dust.

The process starts on a smaller scale. The strong winds begin to (21) __________ the loose, dry sand from the ground. (22) __________ these sand particles are so fine and light, they are easily picked up. As they are carried along, they bounce against the ground and knock other, larger particles into the air. This chain reaction causes a massive amount of sand to enter the atmosphere.

This mass of sand keeps (23) __________ as it moves across the landscape, forming a towering wall that can stretch for many kilometers. A meteorologist once explained that the wall of sand (24) __________ reach heights of several kilometers. This cloud is carried by the wind over vast distances, sometimes crossing from one country to another and affecting areas far from the original desert source.

The most immediate effect of a sandstorm is a dramatic reduction in visibility. It can become so dark that it feels like nighttime, even in the middle of the day. People caught in a sandstorm must find shelter and wait out the storm until it passes. The fine particles can also cause breathing difficulties. If you saw a sandstorm approaching, you would see a massive, dark cloud on the horizon.

In conclusion, the formation of a sandstorm requires a specific set of environmental conditions. It is a powerful reminder of how wind can shape and transform the landscape. For people living in desert areas, understanding these events is crucial for safety. It is often the eerie calm before the storm that gives the first warning of what is to come.

The thrill of kicking a football or sinking a basketball shot is an amazing feeling. Sports are fantastic for staying active, building friendships, and having fun. However, one thing can quickly dampen that excitement: an injury. Nobody wants to be sidelined, watching friends play while nursing a twisted ankle or strained muscle. For young athletes, aged 14-15, getting injured means missing out on the very activities they love. Understanding how to play safely isn't just about avoiding pain; it's about staying in the game.

One crucial step to preventing injuries is properly preparing your body. This means always doing a thorough warm-up, not just a quick stretch. A good warm-up involves light cardiovascular activity, like a gentle jog, followed by dynamic stretches. This gets blood flowing, increases muscle temperature, and makes your body more pliable, less prone to sudden tears. Equally important is the cool-down, gentle stretching after activity. This helps reduce muscle soreness and aids recovery, ensuring readiness for the next game. [I]

Beyond warming up, employing proper technique is fundamental. For many young football players in Vietnam, who often learn informally, a lack of structured coaching on correct techniques can lead to preventable sprains or strains. [II] Additionally, wearing appropriate gear – such as well-fitting sports shoes or shin guards – provides crucial protection, safeguarding you from impact and overuse injuries. [III]

Another vital aspect of playing it safe involves listening carefully to your body. [IV] Never try to "play through" pain. Pain signals an issue; ignoring it causes more severe injuries and longer recovery. If discomfort arises, take a break. Adequate rest, hydration, and nutrition are also crucial for injury prevention. Staying well-hydrated helps muscles function optimally, while a balanced diet provides the necessary nutrients for repair and physical resilience.

Ultimately, playing your favorite sport safely doesn't have to be complicated. By consistently incorporating warm-ups, cool-downs, and correct techniques, you significantly reduce injury risk. These simple rules mean more time on the field or court, actively participating and having fun with friends. Taking responsibility for your body and understanding these preventative measures empowers you to enjoy sports to the fullest, ensuring a long and healthy athletic journey.