Đề ôn thi Đề thi vào lớp 10 Trường THPT Chuyên KHTN môn Tiếng Anh - Mã đề KHTN-122

My friend Alex has a very peculiar sense of humor. It’s not the kind of humor you find in comedy shows; it’s much more subtle and strange. (23) __________. (24) __________

Have you ever wondered how a simple screw works? It's one of the (25) __________ useful tools in engineering. At its core, a screw is just an inclined plane wrapped around a cylinder. When you turn a screw, its threads convert your rotational motion into a powerful linear motion. (26) __________ allows the screw to move into materials like wood or metal, holding objects together very securely.

Designing the right screw for a job requires engineers (27) __________ the materials involved. A screw for soft wood is different from one for hard steel. The angle and spacing of the threads (28) __________ a crucial role in its effectiveness. The final (29) __________ of a screw is also important; some are for easy removal, while others are permanent. Ultimately, understanding this simple machine isn't rocket science; it's (30) __________ once you see it as a spinning ramp!

Dengue fever is a serious viral infection transmitted to humans through the bite of an infected Aedes mosquito. It represents a major public health challenge, particularly in tropical and sub-tropical regions like Southeast Asia. In Vietnam, dengue outbreaks are common, especially during the rainy season. Therefore, understanding this disease and knowing how to prevent it are essential skills for every family to protect its members and the wider community.

When a person is infected, the first symptoms usually appear after 4 to 10 days. These often include a high fever, severe headache, pain behind the eyes, muscle and joint pains, and a skin rash. While many people recover within a week or so, dengue can sometimes become severe, leading to a dangerous condition called dengue hemorrhagic fever. This makes early detection and proper care very important for patients.

The most effective way to prevent dengue is to stop mosquitoes from breeding. The Aedes mosquito lays its eggs in standing water. These breeding grounds can be found in and around our homes in places like flower pots, old tires, and water storage containers. To control the mosquito population, we must eliminate these sources of standing water. Regularly checking and cleaning these areas can significantly reduce the risk of dengue transmission in our neighborhoods.

In addition to managing breeding sites, taking personal protective measures is also crucial. This includes wearing long-sleeved clothing, using mosquito repellent on exposed skin, and sleeping under a mosquito net, especially during the day when Aedes mosquitoes are most active. By taking these simple but effective steps, we can all contribute to creating a safer, dengue-free environment for ourselves and our families.

Many shoppers believe paper bags are the eco-friendly choice over plastic. However, the debate is more complex. While paper bags are biodegradable, (37) __________. This heavy resource use contributes to air and water pollution.

On the other hand, plastic bags, though cheaper to produce, pose a major threat to wildlife and ecosystems. They are not biodegradable, (38) __________. Furthermore, their lightweight nature means they easily travel by wind, (39) __________. The best solution might be to avoid single-use bags altogether, (40) __________.

A. cluttering landscapes and blocking drainage systems

B. choosing reusable options made from durable materials instead

C. producing them requires significantly more energy and water than plastic bags

D. breaking down into harmful microplastics that contaminate our oceans and soil for centuries