Câu 9: Vì sao đổ nước nóng vào cốc thủy tinh dày dễ vỡ hơn vào cốc thủy tinh mỏng? Câu 10: Vì sao đáy nồi nhôm nấu nướng lâu ngày bị võng xuống? Câu 11: Vì sao cửa gỗ khó đóng sát vào mùa mưa? Câu 12: Vì sao không nên ăn thức ăn quá nóng hoặc quá lạnh? Câu 13: Khi mở một lọ thủy tinh có nút thủy tinh bị kẹt, ta phải dùng cách nào? Câu 14: Tại sao chỗ tiếp nối của 2 thanh ray đường sắt lại có một khe hở? Câu 15: Vì sao quả bóng bàn bị bẹp, nhúng vào nước nóng thì phồng lên?

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UNIT 5: VIETNAMESE FOOD AND DRINK A. PRONUNCIATION 2. Choose the word whose underlined part is different from the others 1. A. talk B. walk C. fall D. sale 2. A. sometimes B. season C. song D. sugar 3. A. walked B. worked C. painted D. washed 4.A. whole B. forest C. role D. fold 5. A. bought B. brought C. thought D. though 6. A. born B. bored C. strong D. sore throat 7. A top B. boss C. job D. more 8. A. bottom B. short C. course D. four 9. A. short B. talk C. bother D. bald 10. A. not B. technology C. hot D. sport B. VOCABULARY 1. Write food and drink under the picture 📷 📷 📷 📷 📷 1. …………… 2……………… 3…………… 4…………… 5……………… 📷 📷 📷 📷 📷 6……………… 7……………… 8…………… 9…………… 10………… C. GRAMMAR 1. Complete these sentences with a, an, some, any 0. There’s some toast on the table. 1. Have you got ______________ bread? 2. If you’re hungry, have ______________ sandwich. 3. My mother often has ______________ banana for her breakfast. 4. I’m thirsty. Can I have______________ drink, please? 5. You didn’t buy ______________ bacon this morning, Mai? 6. If you eat ______________ apple every day, you can keep the doctor away. 7. Is there ______________cheese, Mom? 8. I think there aren’t ______________ sweets left. 9. There were ______________ cups of tea on the table this morning. 10. I don’t know if Mr. Hai likes drinking _____________ cup of white coffee every day. 2. Choose the best answer 1. I’d like ( a tube of/ a bottle of/ a bar of/ a can of) chocolate. 2. Is there ( any/ some/ many/ few) beer in the fridge? 3. How much (bananas/ oranges/ eggs/ sugar) do you need? 4. She never touches ( healthy/ unhealthy/ good/ delecious) food. 5. What would you like to eat? ( I’d like a pizza/ I like pizza/ yes, thanks/ yes, please) 6. Her mother ( made/ divided/sliced/heated) the beef into strips. 7. Children ( need/ needn’t/ should/shouldn’t) eat too many sweet things. 8. Add ( few/ a little/ may/ too much) salt to the soup, please. 9. Stop, please. That is ( a little/ a few/ too much/ too many) coffee. 10. I ate ( too much/ too a lot of/ plenty/ so many) ice cream so I felt sick.