4. Tiến hành cho lai bí quả dài là trội so với bí quả dẹt. Xác định tỉ lệ kiểu gen, kiểu hình khi cho lai: a) Bí quả dài thuần chủng với bí quả dẹt. b) Bí quả dài không thuần chủng với bí quả dẹt. c) Bí quả dài không thuần chủng tự thụ phấn. d) Bí quả dài thuần chủng với bí quả dài không thuần chủng.

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3 Ask about the underlined words, then match the questions to the pictures. 1. ………………………………………………………………………………………… . The kids are climbing up the tree in the garden. 2. ………………………………………………………………………………………… . He plays baseball twice a week. 3. ………………………………………………………………………………………… . They drove to the beach on Sunday. 4. ………………………………………………………………………………………… . Linda saw a squirrel when she got up. 5. ………………………………………………………………………………………… . He loves rainy days. 6. ………………………………………………………………………………………… . Paul is chasing his brother in the park. 7. ………………………………………………………………………………………… . The want to go to the zoo. 8. ………………………………………………………………………………………… . The two boys are hiding behind the door. 9. ………………………………………………………………………………………… . Mum cut his son’s hair yesterday morning. 10. ………………………………………………………………………………………… . Lisa went to the supermarket with her mother. 11. ………………………………………………………………………………………… . Frank has bought Mary a bunch of flowers. 12. ………………………………………………………………………………………… . Tom is helping his dad take the rubbish out. 13. ………………………………………………………………………………………… . She is crying because she has got lost. 14. ………………………………………………………………………………………… . Dave goes to school on foot.