a/Phân biệt hiện tượng trao đổi đoạn và hiện tượng đột biến chuyển đoạn NST về nguyên nhân ,cơ chế, ý nghĩa? b/Nêu những dạng đột biến cấu trúc NST không làm thay đổi hàm lượng ADN của 1NST .Hậu quả các dạng đột biến này.

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I. Find the word which has different sound in the part underlined. 1. A. laughed B. washed C. danced D. played 2. A. beds B. dogs C. porters D. books 3. A. pictures B. watches C. buses D. brushes 4. A. homework B. mother C. open D. judo 5. A. leisure B. eight C. celebrate D. penalty 6. A. fun B. sun C. surf D. cut 7. A. bracelet B. cake C. make D. hat 8. A. although B. laugh C. paragraph D. enough 9. A. comedy B. letter C. princess D. cinema 10. A. high B. sight C. this D. find II. Choose the words that have the different stress from the others. 1. A. satisfied B. socialize C. volunteer D. exercise 2. A. information B. technology C. community D. activity 3. A. library B. museum C. melody D. favourite 4. A. protection B. addicted C. computer D. goldfish 5. A. skateboard B. sticker C. adore D. leisure III. Choose the best answer. 1. My dad doesn’t mind my mom from work every day. A. pick up B. picked up C. picking up D. picks up 2. Using computers too much may have harmful effects your minds and bodies. A. on B. to C. with D. onto 3. I love the people in my village. They are so and hospitable. A. friendly B. vast C. slow D. inconvenient 4. Among the , the Tay people have the largest population. A. groups B. majorities C. ethnic minorities D. ethnic cultures. 5. People in the countryside live than those in the city. A. happy B. more happily C. happily D. less happy 6. Viet Nam is multicultural country with 54 ethnic groups. A. a B. an C. the D. A and C 7. We to the countryside two months ago. A. go B. have gone C. went D. will go 8. What will you do if you the final examinations? A. will pass B. would pass C. pass D. passed 9. It rained hard. , my father went to work. A. Therefore B. However C. Because D. So 10. Your sister writes poems and stories, she? A. does B. doesn’t C. will D. won’t IV. Give the correct form of the following verbs. 1. Mai enjoy crafts, especially bracelets. (make) 2. you ever a buffalo? (ride) 3. The children used to a long way to school. (go) 4. They hate their son texting his friends all day. (see) 5. Do you fancy in the park this Sunday? (skateboard)