Đề ôn thi Đề thi vào lớp 10 Trường THPT Chuyên KHXH môn Tiếng Anh - Mã đề KHXH-121

Ethanol is (35) __________ type of biofuel, which is a fuel derived from renewable biological sources. It is often blended with gasoline to power vehicles. It is mainly produced from agricultural crops like corn and (36) __________. These plants are rich in sugars or starches, which are the key ingredients for its production.

The process of (37) __________ ethanol starts with harvesting these crops. First, the plant material is crushed. For crops like corn, the starches must be converted into simple sugars. This is done through a process called hydrolysis, (38) __________ they can be fermented more easily.

The next stage is fermentation. The guide explained that the process (39) __________ about 48 hours to complete. During this step, microorganisms, usually yeast, are added to the sugary mixture. The yeast helps to (40) __________ the sugars into ethanol and carbon dioxide. This reaction is what creates the alcohol.

After fermentation, the liquid contains ethanol, water, and solid residues. This mixture is then heated in a process called distillation. Since ethanol has a lower boiling point than water, it evaporates first. The vapor is collected and cooled back into a liquid, which is now much more concentrated. This purified ethanol is ready for use as a fuel.

For countries with large agricultural sectors, producing ethanol is like (41) __________ with one stone, as it supports farmers and promotes cleaner energy. If we (42) __________ more in biofuel technology, we could significantly reduce our carbon footprint in the future.

What is food? On the surface, it’s just fuel for our bodies. But if you look closer, food is a language that tells a story about who we are, where we come from, and what we value. This is the idea behind gastronomy tourism, a growing trend where travelers choose destinations not for the beaches or museums, but for the chance to taste something unique. They travel to eat, believing that a bowl of soup or a piece of bread can be a window into the soul of a culture.

Vietnam is a prime example of food’s cultural power. Many people remember when American chef Anthony Bourdain sat down with President Barack Obama on small plastic stools in a humble Hanoi eatery to eat Bún Chả. This moment was more powerful than any formal dinner. It showed the world an authentic side of Vietnamese life – one that values simple, delicious food shared in a community setting. This single meal became a global advertisement, not just for a dish, but for a culture that is welcoming, proud, and confident in its culinary traditions.

So, how exactly does food tell these stories? The ingredients and cooking methods are historical and geographical records. For instance, the abundance of fresh herbs and rice in Vietnamese cuisine speaks to its fertile river deltas. The Bánh Mì, with its French-style baguette, tells a story of colonial history combined with local innovation. They reveal how a nation has adapted, survived, and created something new from its past experiences. The way people eat—whether in large family gatherings or at bustling street food stalls—also reflects their social values.

Of course, eating is just one piece of the cultural puzzle. Simply tasting Phở doesn’t mean you will instantly understand the complexities of Vietnamese history or the nuances of its language. A true, deep understanding requires more effort: learning about customs, talking to local people, and studying the past. Food is a delicious and accessible entry point, a gateway to curiosity. It sparks an interest that can lead to a more profound connection with a place and its people.

For teenagers in Vietnam, this global interest in your daily food is a source of pride. The Bánh Mì you buy on the way to school or the bowl of Phở your family enjoys on weekends is more than just a meal. It is a piece of your cultural heritage that people from all over the world travel thousands of miles to experience. Understanding this can change how you see your own food and how you connect with the visitors who come to share it.