Đề ôn thi Đề thi vào lớp 10 Trường Phổ thông Năng khiếu môn Tiếng Anh - Mã đề PTNK-137

The pop-up toaster is a familiar sight in most modern kitchens, designed for one simple purpose: to toast slices of bread perfectly. At first glance, it seems like a very basic machine, but its internal mechanism is a clever example of simple engineering. It is (21) __________ common kitchen appliance that uses a combination of heat and timing to achieve a consistent result every time, making breakfast preparation quick and easy for millions of people around the world.

The process begins when you place bread slices into the slots on top and push down a lever. An early inventor once remarked that its genius (22) __________ in its simplicity. Pushing the lever does two things: it lowers the bread into the toaster's body and it completes an electrical circuit. This action locks a spring-loaded tray into place and activates the heating (23) __________, which are thin wires that glow red hot.

Once the circuit is active, these special wires begin to generate intense heat, which is directed at the bread. At the same time, a timer—either mechanical or electronic—starts counting down. The bread is toasted on both sides by the radiant heat until the timer reaches zero. The duration of this process can usually be adjusted with a knob, allowing for different levels of browning, from light to dark.

The 'pop-up' moment is the most satisfying part. When the timer finishes its cycle, it (24) __________ the power to the heating elements and triggers a release mechanism. This instantly unlocks the spring-loaded tray, which pushes the toast up and out of the slots. If the spring mechanism didn't exist, you would have to manually remove the hot toast, which would be far less convenient and safe.

This automated sequence is what makes the toaster so brilliant. The entire process avoids the need for a person to watch the toast constantly to prevent it from burning. It is a reliable, efficient, and simple piece of technology that works perfectly for its intended task. It’s a design that has truly stood the test of time, remaining largely unchanged for decades.

Ho Chi Minh City's eagerly anticipated metro launch signifies more than just faster commutes; it heralds a significant shift in urban culture. Globally, new mass transit systems require citizens to adapt to different social norms for sharing public spaces. The HCMC Metro Line 1 isn't merely infrastructure; it's a new social arena, challenging us to reconsider how we behave in shared environments. The critical question isn't only "Will it speed up our travel?" but "Will it reshape our collective public conduct?" This is an invitation for civic evolution.

This cultural adaptation involves mastering new etiquette. [I] Will people instinctively form orderly queues, allowing clear exits before boarding? Will younger passengers readily offer seats to the elderly, pregnant, or disabled? [II] These aren't trivial suggestions; they are unwritten social contracts ensuring a smooth, respectful experience. [III] Adopting these habits is essential for efficient, pleasant metro operation, transforming chaotic crowds into orderly communities.

[IV] The rationale behind these behavioral expectations centers on collective well-being. Orderly queuing prevents chaos and speeds up boarding. Offering seats is a simple, powerful act of empathy, fostering community over individual comfort. Maintaining cleanliness demonstrates respect for fellow passengers and public investment. When everyone adheres to these norms, journeys become less stressful, more predictable, and genuinely positive. It elevates a functional commute into a shared, civil space, reflecting the city's maturity and citizens' consideration.

For young people, particularly 14-15 year olds, this metro will become an integral part of daily life. Imagine using it for school, meeting friends, or exploring new city areas. This new transport mode will be a constant backdrop to their teenage years. Understanding and adopting the metro's unwritten social rules will be crucial. It's not just about routes; it’s about actively contributing to a polite and efficient environment. Your actions directly influence the experience for everyone, including your peers, shaping the new norm.

Ultimately, the HCMC Metro Line 1's success hinges on users embracing a new public culture. It offers an unparalleled chance for the city to cultivate greater civic responsibility and mutual respect. By consciously adopting habits like queuing, seat-giving, and cleanliness, each individual contributes to a harmonious and efficient public space. This transcends merely riding a train; it's about collaboratively building a more considerate urban society, one journey at a time, where public spaces reflect the finest qualities of its people.