Câu 1. Tại sao gọi thằn lằn và các sinh vật cùng loại là bò sát? Câu 2. So sánh đặc điểm của bộ xương thỏ và bộ xương thằn lằn Câu 3. Tại sao nói sự đẻ trứng kèm theo sự thụ tinh ngoài kém hoàn chỉnh hơn so với sự đẻ trứng với sự thụ tinh trong?

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cả 3 bài đều chia độn từ đúng trong ngoặc nhé Exercise 2: 1. I (see) ------------------- a car accident on this corner yesterday 2. Mr. John (be) ------------------ principal of our school since last year. 3. My father (not watch) --------------------- TV every night. 4. I (meet) -------------------- Arthur three weeks ago. Last month I (be) ------------------------- in the hospital for ten days. 5. Don’t call me in the afternoon. I usually (be) --------------------------- away in the afternoon. 6. People (speak) ------------------- English in almost all of Canada. Exercise 3: 2. He (come) ------------------- and (see) --------------------- you soon. 3. My mother (come) ----------------------- to stay with us next weekend. 4. Where…are... you (spend) ------------------- your holidays next summer? 5. Violets (bloom)----------------- in spring. 6. They (prepare)-------------------- the Christmas dinner at the moment. 7. When he lived in Manchester, he (work) ---------------- in a bank. 8. Birds (build) ------------------ their nests in summer and (fly)---------- to the South in winter. 9. I (lose) -------------------my key. (can) ---------------------you help me look for it? 10. My brother (join) ----------------------the army when he (be) --------------------young. Exercise 4: 1. Miss Lee often (write)______________ when he (be)____ young. 2. He (leave)_____________________ home two weeks ago 3. You (speak)________________________ to Mrs. Bakers yesterday? 4. Columbus ( discover ) ___________________America more than 400 years ago. 5. When Nguyen Du (die)________? – 6. Hurry up! The train (come___________. đến 9h nha