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Based on the given International Phonetic Alphabet (IPA) notations, we can analyze the pronunciation of each word and identify the vowels that may be left out due to elision. 1. different: ˈdɪfərənt (The vowel "ə" may be left out, resulting in "ˈdɪfrənt".) Underline the vowel: difˈferent 2. interest: ˈɪntərɛst (The vowel "ə" may be left out, resulting in "ˈɪntrɛst".) Underline the vowel: interˈest 3. history: ˈhɪstəri (The vowel "ə" may be left out, resulting in "ˈhɪstri".) Underline the vowel: hisˈtory 4. library: ˈlaɪbrɛri (No vowel is typically left out.) Underline the vowel: libˈrary 5. secondary: ˈsɛkəndɛri (The vowel "ə" may be left out, resulting in "ˈsɛkndɛri".) Underline the vowel: secˈondary 6. every: ˈɛvəri (The vowel "ə" may be left out, resulting in "ˈɛvri".) Underline the vowel: evˈery 7. evening: ˈivnɪŋ (No vowel is typically left out.) Underline the vowel: evˈening 8. automatically: ɔtəˈmætɪkli (The vowel "ə" may be left out, resulting in "ɔtˈmætɪkli".) Underline the vowel: autoˈmatic 9. elementary: ɛləˈmɛnʧri (The vowel "ə" may be left out, resulting in "ɛlˈmɛnʧri".) Underline the vowel: eleˈmentary 10. delightful: dɪˈlaɪtfəl (The vowel "ə" may be left out, resulting in "dɪˈlaɪtful".) Underline the vowel: deˈlightful Now, let's analyze the sentences and identify the words with reduced vowels: 1. All the ASEAN countries have a long history. Underline the reduced vowel: All the ASEAN countries have a long hisˈtory. 2. The ASEAN countries are rich in natural resources. (No reduced vowels) 3. That agency promotes different business among ASEAN countries. Underline the reduced vowel: That agency promotes difˈferent business among ASEAN countries. 4. The temperatures in the evening are not lower than $20^0C.$ Underline the reduced vowel: The temperatures in the evˈening are not lower than $20^0C.$ 5. It is interesting to study the literature of every ethnic group. Underline the reduced vowels: It is interˈest to study the literature of evˈery ethnic group. 6. It is not reasonable for the secretary to finish every task this evening. Underline the reduced vowels: It is not reasonˈable for the secˈretary to finish evˈery task this evˈening. 7. We need to have general knowledge to understand different cultures. Underline the reduced vowel: We need to have genˈeral knowledge to understand difˈferent cultures. 8. It is comfortable to read books in this library. (No reduced vowels) I. Complete the sentences with the words given. 1. They have set themselves a series of **goals** to achieve by the end of the month. 2. Improving your **leadership skills** can help you find higher-paid work. 3. The mayors of Tokyo and New York signed an agreement to encourage **cultural exchanges** between the cities. 4. The ASEAN has exercised leadership and argued for policies that support the expansion of trade, growth and **development**. 5. Some of the current **issues** in the implementation of care management are considered. 6. Charities such as Oxfam are always trying to recruit **volunteers** to help in their work. 7. All **contributions** for the school magazines must be received by October 1. 8. She was extraordinarily well **qualified** to take part in the project. 9. I used my phone to **live stream** from Times Square, New York City. 10. The film 'China Blue' is a(n) **eye-opening** look into the lives of sweatshops. II. Fill in each blank in the following sentences with the correct word below. 1. Viet Nam always desires to work with its partners on the basis of the **principle** of respect for independence, sovereignty, equality and mutual benefit. 2. International programmes should aim to enhance cooperation for peace, **stability** and development. 3. In the past years, high **economic** growth has enabled Viet Nam to increase people's living standards. 4. Viet Nam is consistently a friend and reliable partner to all nations, and a responsible member of the international **community**. 5. That ASEAN Summit tried to find appropriate **solutions** to further accelerate the course of building the ASEAN Community. 6. Viet Nam always desires to work with its partners to build and reinforce strategic **relations** for peace, cooperation and development. 7. We are glad to see the strong development of **relations** between ASEAN and its partners. 8. Regular dialogue and cooperation contribute to the **maintenance** of peace and security in the region. III. Choose the correct words. 1. Education is one of the basic human rights written into the United Nations **Charter**. 2. Lifetime employment gives employees greater career **stability**. 3. We **focus** on maintaining contact with old school friends when we have left school. 4. Some Central Asian countries used to belong to the former Soviet **bloc**. 5. His mother is an active member of our school's parent-teacher **association**, and she tried to arrange activities to raise money for it. 6. The meetings stated the need to strengthen regional **co-operation** in ASEAN. 7. Local people expressed **solidarity** with the government's measures to fight against the COVID-19 pandemic. 8. The right to speak freely is written into the **constitution** of many countries. 9. Manchester City **dominated** throughout the football match. 10. There are three fundamental **principles** of teamwork.