Những bệnh nhân bị bệnh về đường hô hấp di phổi không hoạt động tốt như người bình thường sẽ được bác sĩ cho thở bình oxy ( oxy được nén ở áp suất cao ) . Hãy giải thích tại sao bệnh nhân thở bình oxy sẽ tốt hơn là thở bằng không khí

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I. Em hãy cho dạng đúng của động từ trong ngoặc để hoàn thành những câu sau.(3pts) 1. Tim usually (get up) …………..and (brush) ………….his teeth at 6.15 but yesterday he (get up)…………….and (brush)………………….his teeth at 7.00 because it (be) ……………………..Sunday. 2. Nhung is very hungry now because she (not eat) ……………….enough this morning. She only 9eat) ……………….a small piece of bread and (drink) ……………….a glass of milk. 3. You (go) …………………to the dentist’s last week, Hung? - Yes. And I (go) ………………….there now to check up the filled tooth. III. Em hãy đọc đoạn văn sau rồi viết T (true) cho mỗi câu đúng F (false) cho mỗi câu sai.(2pts) Even before it is born, a baby has small teeth under its gums. At about the age of six moths, its first tooth starts to grow. Before the young child is three years old, it has twenty small teeth. Between the ages of six and twelve a second set of teeth form in the gum bellow the first teeth and push them out. 1/ A baby has teeth under its gums even before its bith. 2/ A baby’s first tooth appears as soon as it is born. 3/ A three-year-old child has twenty tiny teeth. 4/ A child’s second set of teeth appear before it is six years old. IV. Em hãy đặt câu hỏi cho phần gạch chân ở những câu sau. (5pts) 1. Minh brushes his teeth twice a day. ...................................................................................................................... 2. Simon is in a lot of pain now because he has a toothache. ........................................................................................................................ 3. I felt sick after eating that food. ....................................................................................................................... 4. Nga went to see the dentist last week. ....................................................................................................................... 5. Dr Lai will check your teeth. ........................................................................................................................ 6. It took Dr Phong 10 minutes to fill Van’s tooth. ...................................................................................................................... 7. My brother is going to the hospital. ...................................................................................................................... 8. Mr. Cuong did morning exercises at 5.30 yesterday. ..................................................................................................................... 9. Hoa received her aunt’s letter five days ago. .................................................................................................................... 10. There are twelve students in Lien’s class having toothache. ....................................................................................................................