Bài 5: 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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Điền giới từ thích hợp cho trước vào ô trống
Before/under/out/between/of
Even before he is born, a baby has small teeth....under......his gums.At about the age.....of......six months, he first tooth starts to grow. .....Before........the young child is three years old, he has twenty small teeth. ....between......the ages of six and twelve, a second set of teeth form in the gum below the first teeth and push them.....out.....
Điền giới từ thích hợp cho trước vào ô trống
Before/under/out/between/of
Even before he is born, a baby has small teeth......UNDER....his gums.At about the age.....OF......six months, he first tooth starts to grow. ....BEFORE.........the young child is three years old, he has twenty small teeth. .....BETWEEN.....the ages of six and twelve, a second set of teeth form in the gum below the first teeth and push them.....OUT.....