Đề ôn thi Đề thi vào lớp 10 Thái Nguyên môn Tiếng Anh - Mã đề TNG-151

Caves are fascinating natural wonders, and many are created by a slow but powerful geological process. The journey (29) __________ when rain falls through the atmosphere and absorbs carbon dioxide, creating a weak acid called carbonic acid. This acidic rainwater then seeps into the ground, finding its way into tiny cracks in soluble rocks like limestone. Limestone is a specific type of rock (30) __________ is particularly vulnerable to being dissolved by this acid. The ongoing chemical reaction between the acid and the rock plays a (31) __________ role in gradually breaking down the stone.

Over immense periods of time, often thousands or millions of years, the water continues this process, widening the small cracks until they grow into large tunnels and enormous chambers. (32) __________, the process isn't just about creating empty space; spectacular formations are also created. The same mineral-rich water drips from the ceiling, leaving tiny deposits behind. These deposits slowly (33) __________ to form stalactites and stalagmites. In the end, this entire beautiful underground world (34) __________ by the simple, patient action of water.

Most of us are familiar with the sounds of city life: the rumble of traffic, the buzz of construction, and the announcements from loudspeakers. While these sounds may seem like a normal part of the urban landscape, they can combine to create a serious, invisible threat known as noise pollution. In bustling Vietnamese cities, this is a daily reality for millions, affecting their quality of life in ways they may not even realize.

The health consequences of prolonged exposure to noise are significant. The constant auditory stress can disrupt sleep patterns, increase blood pressure, and lead to chronic stress. For teenagers, this is particularly damaging. The noise you hear on your way to school or in your neighborhood can directly affect your ability to concentrate on your studies and retain information, making learning more difficult and stressful.

Recognizing this issue, authorities have tried to address specific problems. For example, the excessive use of vehicle horns is a common complaint. To combat this, Vietnamese regulations, such as Decree 100, have been introduced to penalize drivers who misuse their horns. However, enforcing these rules in crowded urban environments remains a considerable challenge, requiring both official action and a change in public awareness.

Ultimately, tackling noise pollution is a shared responsibility. It requires governments to implement smarter urban planning, such as creating green spaces that absorb sound and enforcing stricter noise limits. At the same time, it depends on individuals to be more considerate—using vehicle horns only when necessary and respecting quiet hours. Creating quieter, healthier cities is a goal that demands effort from every member of the community.