Loại mạch máu nào sau đây có chức năng vận chuyển máu giàu ôxi và các chất dinh dưỡng từ tim đi nuôi cơ thể? A. Tĩnh mạch phổi. B. Tĩnh mạch chủ. C. Động mạch chủ. D. Động mạch phổi.

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Bài tập 1. Điền ‘a’, ‘an’ hoặc Ø vào chỗ trống sao cho phù hợp. 1. _______ Earth orbits around _______ Sun. 2. _______ dogs are our best friends. 3. My mother used to be _______ most beautiful girt in her class. 4. We need to join hands to protect _______ cheetahs from extinction. 5. My foreign friend took me on a sightseeing tour around _______ town. 6. There are many festivals taking place in _______ spring. 7. Communication has never been so convenient before thanks to _______ Internet. 8. Last year, a terrible storm reached _______ Philippines. 9. Many people mistake Rio de Janeiro for _______ capital of Brazil. 10.Many people migrate to _______ US in the hope of material success. Bài tập 2. Khoanh tròn đáp án đúng. 1. Please turn off ________ air-conditioner when you leave________ room A. the - the B. a - the C. a - a D. the - a 2. Jim hasn’t found________ place to________ night. A. the - the B. a - the C. a - a D. the - a 3. Can you show me ________ way to________ post office please? A. the - the B. a - the C. a - a D. the - a 4. Mr.Smith is________ old customer of my store and he is also________ man A. the - the B. a - an C. an - a D. the - a 5. My brother has boughtme________ beautiful dress as a birthday present. A. the B. a C. an D. Ø 6. Jim is___ youngest boy of the family and this year he will go to _____ school. A.the-Ø B. a - a C. a - the D. the - a 7. There is a huge gap between________ rich and________ poor in this country. A. the - the B. a - an C. a - the D. the - a 8. Peter was in_____ hospital and yesterday we went to____ hospital to visit him. A. the - Ø B. the - the C. Ø - the D. the-a 9. My sister told me that she had met her old teacher________ day before. A. the B. a C. an D. Ø 10. Have you ever gone to________ prison to visit him? A. the B. a C. an D. Ø Bài tập 3. Điền a/an/ the/Ø vào chỗ trống sao cho phù hợp. 1. After having ________ breakfast, we went out for________ walk in________ local park. 2. Watch out! Do not sit on________ bench. It has been painted recently. 3. My father often takes me to________ cinema on________ Sunday. 4. Yesterday________ Prime Minister gave a speech in front of his people. 5. Jim is always staying in________ bed until lunch time when he doesn’t have to go to ________school. 6. The robber was sent to________ prison for five years. 7. My brother has got________ new job and in________ next few years he will live far from home. 8. Mr. Brown always water his trees in________ morning. 9. As________ little boy, I wished to be________ hero but now I just want to be________ normal personwith________ decent job. 10.Although I had worked in________ France for 3 years, I could hardly speak French.