Đề ôn thi Đề thi vào lớp 10 Hà Nội môn Tiếng Anh - Mã đề HN-153

For avid readers who love to travel, choosing what to pack can be a challenge. Physical books are bulky and heavy, but e-readers offer a modern solution. (23) __________. (24) __________

Among the nearly 100 moons orbiting Jupiter, Europa stands out as a special case. It was first observed by Galileo Galilei in 1610, but our modern understanding really began with data from spacecraft. For instance, the Galileo mission, which (25) __________ the Jovian system between 1995 and 2003, sent back incredible images. These pictures showed a bright surface of water ice, covered in long, dark cracks. For decades, Europa has continued to (26) __________ the attention of astronomers and space agencies worldwide.

(27) __________, what makes Europa truly fascinating isn't its surface, but what might lie beneath it. Scientists have strong evidence to suggest a vast saltwater ocean is hidden under the ice. This massive ocean (28) __________ by heat generated from Jupiter’s powerful gravity. This internal warmth could create the right (29) __________ for life to develop, similar to the ecosystems found around deep-sea vents on our own planet. For this reason, Europa is a key target for future missions (30) __________ will aim to explore this hidden world and search for signs of life.

In cities across Vietnam, from Hanoi to Ho Chi Minh City, a green trend is growing. Young people are filling their rooms and favorite cafes with houseplants. This is not just for decoration; many believe these plants are natural air purifiers. Shops and social media often promote specific plants as being excellent at cleaning the air. But is this popular belief based on solid science, or is it more of a hopeful myth?

The idea that plants can clean indoor air comes from a famous 1989 NASA study. Researchers found that common houseplants could absorb harmful chemicals called volatile organic compounds (VOCs) from the air in a sealed laboratory chamber. This process happens as the plant takes in gases through its leaves and the microorganisms in the soil also play a part. The study was originally intended to explore life support systems for potential space stations.

However, translating these findings to a typical home or bedroom is complicated. The NASA experiment was conducted in a small, airtight chamber. Our rooms are much larger and have constant air exchange from windows, doors, and ventilation systems. Therefore, the cleaning effect of a few plants in a normal-sized room is actually quite minor. You would need an enormous number of plants—perhaps hundreds—to have a noticeable impact on air quality.

So, should you get rid of your plants? Absolutely not. While they may not be powerful air filters, houseplants offer other proven benefits. Studies show they can reduce stress, boost mood, and improve focus. They add beauty and a touch of nature to our urban lives. It's best to appreciate houseplants for these qualities, rather than relying on them to solve air pollution problems.

Biofuels, fuels made from plants like corn and sugarcane, are often seen as a green alternative to fossil fuels. (37) __________. However, this seemingly simple solution has sparked a major global debate, often called the "food versus fuel" dilemma. When farmers use land to grow crops for fuel, that same land cannot be used to grow food. (38) __________. As a result, the world's poorest populations may struggle to afford basic meals.

Moreover, the environmental advantages are not always clear-cut. (39) __________. For example, clearing forests to create new farmland for biofuel crops can release massive amounts of stored carbon into the atmosphere. (40) __________. Clearly, finding a sustainable path forward is a complex challenge.

A. This competition for agricultural land can drive up the price of essential foods

B. Therefore, the overall benefit to the climate is often debated

C. They are considered renewable resources, unlike finite fossil fuels

D. The process of growing and converting plants into fuel also requires significant energy