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chamqldd
2 năm trước
Xét tính trạng màu sắc hoa: A: hoa đỏ a: hoa trắng Cho cây hoa đỏ ở thế hệ P tự thụ phấn, F1 xuất hiện cả hoa đỏ và hoa trắng. Tỉ lệ kiểu gen ở F1 là
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ngắn lắm mn ơi mà điểm cao nữa  Exercise 2: Read the passage and decide which answer A, B, C or D best fits each space. Thirty years ago in Vietnam, very few people had TV sets. These TV owners were very ______. After dinner, their neighbors gathered (2) __________ inside and outside their houses. Some watched through the windows. All evening, they sat and (3) _______ the black and white programs. The older people might sleep a little and the children might play (4) ______ their friends, but no one went home until the program finished. Times have changed. Today, many families (5) ______ a TV set. People sit in their own living rooms and watch TV. Life is more comfortable now, but many neighbors don’t spend much time together any more. 1. A. useful B. popular C. general D. unpopular 2. A. both B. twice C. one D. two 3. A. watches B. watching C. to watch D. watched 4. A. for B. with C. to D. from 5. A. had B. have C. haven’t D. has

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