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Câu 6. Ở người, tính trạng màu mắt, bệnh galactôzơ huyết và máu khó đông do 3 gen độc lập nhau quy định. Biết rằng mắt đen là tính trạng trội so với mắt xanh, bệnh máu khó đông do gen nằm trên nhiễm sắc thể giới tính quy định. Trong một gia đình, người chồng mắt đen, vợ mắt xanh, đều không mắc hai bệnh trên sinh con đầu lòng là con trai mắt xanh, bị cả hai bệnh galactôzơ huyết và máu khó đông. Nếu cặp vợ chồng trên muốn sinh thêm 2 người con nữa, tính xác suất trong các trường hợp sau: a. Sinh được hai con trai có kiểu gen giống bố. b. Sinh được con trai thứ hai có kiểu hình giống bố và con gái út có kiểu gen giống mẹ. c. Sinh được một con gái có kiểu hình giống bố và một con trai mắt xanh, bị một trong hai bệnh trên.

Valentine's s Day is always on Fedruary 14. It's not a (23) _______ day. On weekdays, schools are open. Banks are open. People go to work. Life goes (24) _______ as usual, but the there is one difference. People give cards and gifts to friends and people they love. They say, " Be my Valentine". There are many kinds of Valentine cards. Some people make cards. Most people buy them. Men and women often give (25) ______ romantic cards. These (26)_________ say, "I love you". The husbands give romantic cards to their wives. Children and friends usually give funny or humorous cards. These cards do not say, " I love you". They are not romantic. Children _______ to give cards to their friends at school parties. Flowers and candies are popular gifts on Valentine's Day. Many people give red roses to people they love. Stores sell chocolates and other candies in heart (28)________. 23. A.office B. regional C. religion D. national 24. A. off B. down C. on D. out 25. A. together B. others C. each other D. one another 26. A. letters B. papers C. cards D. decorations 27. A. are forced B. are prevented C. are encouraged D. are created 28. A. shapes B. scenes C. ways D. areas

Complete the second sentence so that it has a similar meaning to the first sentence, using the word given. Do not change the word given. 69. The TV programme was so complicated that none of the children could understand it. (too)  The TV programme …………………………………………………………………………….……. to understand. 70. Luke knocked over the old lady’s bicycle by accident. (mean)  Luke …………………………………………………………………………….……. over the old lady’s bicycle. 71. I’ve already planned my next holiday. (arrangements)  I've already …………………………………………………………………………….……. my next holiday. 72. They say the ice in Antarctica is getting thinner all the time. (said)  The ice in Antarctica …………………………………………………………………………getting thinner all the time. 73. We didn’t enjoy our walk along the seafront because it was so windy. (prevented)  The strong wind…………………………………………………………………………….……. our walk along the seafront. 74. It looks as if Susan has left her jacket behind. (seems)  Susan …………………………………………………………………………….……. her jacket behind. 75. A newly qualified dentist took out Mr Dupont's tooth. (taken)  Mr Dupont …………………………………………………………………………….……. by a newly qualified dentist. 76. Antonio only lost the 100-metre race because he fell. (not)  If Antonio had …………………………………………………………………………….……. won the 100-metre race. 77. The teachers agreed to introduce the new methods. (agreement) @ There …………………………………………………………………………….……. to introduce the new methods. 78. The fox was unsuccessful in reaching the grapes.(vain)  The fox…………………………………………………………………………….……. the grapes.

6. Her family over her work. A. takes advantage B. takes pride C. takes priority D. takes part 7. Throwing trash onto the river . A. must be prohibited B. is permitted C. should be encouraged D. might not be forbidden 8. He provided me ___________ everything I needed. A. of B. for C. with D. to 9. can help you control your weight. A. a big party B. a little water C. a balanced diet D. a great deal of candy 10. The Ao Dai _____________ in poems, novels and songs for centuries. A. has been reused B. has been designed C. has been mentioned D. has been repainted 11. What was it that ____________ her from her classmate ? A. differed B. distinguished C.gathered D. attracted 12. She asked me _______________ . A. if the questions was too difficult to answer B. whether the questions were not easy enough to answer C. if the questions was difficult or not D. were the questions too difficult 13. Tet is a festival ______________ in late January or early February. A. which attends B. which releases C. which occurs D.which produces 14. If everyone in the world _________, the amount of waste going in to landfills would increase. A. stopped recycling B. avoided polluting C. kept on pumping D.admitted littering 15. Farmer should reduce ___________ on plants as soon as possible. A. watering B. spraying pesticides C. consuming D. harvesting 16. It ___________ years since we last met Sandra. A. was B. is C. were D. are 17. You ______ learn English well without opening your mouth. A. can’t B. mightn’t C. mustn’t D. needn’t 18. It’s a pity that the Spanish course is ____________ at the moment. A. opened B. spoken C. well - qualified D. unavailable 19. The UFO stayed in the sky for about thirty seconds, and then it disappeared. A. vanished B. collapsed C. revived D. exploded 20. the car was expensive, he bought it. A. Despite B. Although C. On account of D. Due to

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