Đọc đoạn văn sau và trả lời câu hỏi

A child gets two sets of teeth. The first set, baby teeth,starts to grow when the child is a baby. The second and last set grows in at school age. They are the permanent teeth. Permanent teeth should last a lifetime. A child grows his first baby tooth at about 7 months of age. It is usually a front one. The remaining baby teeth grow in over the next 24 months. By the time the child is 30 months old, there will be a total of 20 baby teeth in his mouth, 10 on top and 10 on the bottom. When the child is between 6 and 12 years old, the permanent teeth push against the roots of the baby teeth, making the fall out. One tooth at a time becomes loose, falls out. The new tooth may not grow in immediately. Between 16 and 22 years, an adult should have a total of 32 permanent teeth: 16 on top and 16 on the bottom.

1. How many sets of teeth can a child have?

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2. How long do permanent teeth last?

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3. When do the front teeth grow?

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4. How many baby teeth can a child has?

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5. Why do the baby teeth fall out?

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Bài 6: Sắp xếp các từ thành câu có nghĩa.

1. you/ Linh/ ,/ what/ with/ matter/ is/ ?/ ,/

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2. talking/ felt/ to/ Minh/ less/ Hoa/ after/ scared/

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3. Trang/ dentist/ did/ last/ why/ to/ the/ go/ week/ ?/

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4. your/ many/ a/ times/ do/ wash/ you/ week/ clothes/ how/ ?/

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5. filled/ tooth/ cavity/ Dr./ my/ the/ Sam/ yesterday/ in/ ,/

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