2: a. ASEAN plays a vital role in promoting economic development and cooperation across Southeast Asia.

b. Vietnam, as a member of ASEAN, has leveraged these partnerships to boost its economic growth.

c. Through ASEAN, Vietnam has expanded its trade networks and attracted foreign investment, particularly in key sectors like manufacturing and agriculture.

d. Furthermore, ASEAN’s regional trade agreements have allowed Vietnam to increase its exports and engage in global markets.

e. This economic collaboration has been crucial in helping Vietnam become one of the fastest-growing economies in the region.

3: a. Scientists have warned that deforestation contributes significantly to global warming.

b. One way to prevent further damage is to protect forests and encourage reforestation.

c. Forests act as natural carbon sinks, absorbing CO₂ from the atmosphere.

d. With effective reforestation efforts, we can reduce the impact of global warming.

e. Additionally, individuals can support these efforts by reducing their use of paper products.

4: a. The Association of Southeast Asian Nations (ASEAN) is a regional intergovernmental organization comprising ten Southeast Asian countries.

b. ASEAN also aims to promote regional peace and stability through adherence to the principles of the United Nations Charter.

c. Established in 1967, its primary goals include accelerating economic growth, social progress, and cultural development in the region.

5: a. It means our planet is getting hotter, mainly due to pollution trapping heat.

b. This rise in temperature leads to problems like melting ice and extreme weather.

c. Global warming is a serious issue caused by human activities.

a. Vietnam has long been committed to the goals of ASEAN, striving to enhance cooperation across various sectors.

b. I firmly believe that ASEAN will play an essential role in shaping the future of Southeast Asia.

c. Dear ASEAN colleagues,

d. Furthermore, Vietnam's contributions to regional stability and economic growth have strengthened its position as a key ASEAN member.

e. Thank you for supporting Vietnam's role within ASEAN as we continue to promote peace and development.

a. The increasing levels of greenhouse gases are causing devastating effects on our planet.

b. Dear Environmental Advocates,

c. Together, we can protect the Earth for future generations by taking small but impactful steps.

d. I urge you to take action and inspire those around you to reduce their carbon footprint.

e. Global warming is no longer a distant issue but a present-day reality that needs urgent attention.

Dear future investors,

a. Vietnam’s engagement in ASEAN has led to remarkable economic growth, benefiting from trade agreements and foreign investment.

b. I am confident that ASEAN will continue to strengthen these economic ties for the benefit of all member nations. c. Furthermore, Vietnam's role within ASEAN has allowed for improved trade relations and expansion into global markets. d. Thank you for considering Vietnam and ASEAN as your investment partners in the region.

e. By choosing to work within ASEAN, you are supporting a region that is committed to sustainable and inclusive growth. Best regards,

a. Global warming is a critical issue that demands our immediate attention.

b. Working together, we can mitigate the effects of climate change for future generations.

c. It's imperative that we all take steps to reduce our carbon footprint and advocate for sustainable practices.

d. The rising global temperatures are causing significant environmental changes, impacting weather patterns and ecosystems worldwide.

e. Dear concerned citizen,

Dear Sarah,

a. This phenomenon, driven primarily by human activities, is causing significant changes to our planet’s climate.

b. We are already witnessing its effects through rising sea levels, extreme weather events, and disruptions to ecosystems.

c. I am writing to you today to discuss the urgent issue of global warming.

d. Addressing global warming requires immediate and concerted efforts from individuals, communities, and governments worldwide.

e. By transitioning to renewable energy sources and promoting sustainable practices, we can work together to mitigate its most severe impacts. Sincerely, Mai Lan

a. Nam: Hi, Mark! How are you? It’s been a while!

b. Nam: Yes, ASEAN is important to Vietnam. We’ve seen a lot of cooperation in trade, tourism, and education.

c. Mark: Hi, Nam! I’m doing well, thanks. I just read about ASEAN. Vietnam seems really involved in it.

12: a. Mia: Why do you think global warming is such a big issue?

b. Tom: It’s because it leads to extreme weather events and rising sea levels.

c. Mia: What can we do to help reduce it?

d. Tom: Simple actions like using less energy and recycling can make a difference.

e. Tom: I think we all need to start reducing our carbon footprint.

13: a. Mai: Global warming is a big problem.

b. Linda: We need to find ways to stop it.

c. Mai: It's because of things people do, like driving cars.

d. Linda: Yes, the Earth is getting hotter.

e. Mai: I also think we need to do something to stop it.

a. Tom: Yes, they joined in 1995 and have been very active.

b. Sam: Hey, did you know Vietnam is a big part of ASEAN?

c. Tom: Vietnam even led ASEAN meetings during the pandemic, showing strong leadership.

d. Sam: They've helped grow the group and boost their own economy.

e. Sam: So, both Vietnam and ASEAN benefit a lot from their partnership!

a. Mark: Yes, I did! It's been a really important partnership for both Vietnam and the region.

b. Mary: Absolutely. Vietnam's entry helped complete the vision of a ten-member ASEAN and fostered greater regional cooperation.

c. Mary: Hi! Did you know that Vietnam officially joined ASEAN in 1995?

d. Mary: That's right, they've even held the ASEAN Chairmanship three times, demonstrating their commitment to the bloc.

e. Mark: And Vietnam has played a crucial role in many ASEAN initiatives, especially in economic development and security.