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2 năm trước
Tìm tập hợp các số nguyên n biết: a) 3n chia hết cho n-1. b) 2n + 7 là bội của n- 3 . c) n +2 là ước của 5n -1. d) n- 3 là bội của n + 4. Giúp mk hứa vote 5 sao bài 41 nhé
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Chọn câu trả lời đúng cho mỗi câu sau. 1. My dog ___ bark unless it is hungry. ​A. don’t​B. won’t 2. Unless you ___ to go to bed early, we should go out. ​A. wants​B. want 3. ___ you don’t slow down, we are going to crash! ​A. If​B. Unless 4. You cannot go into bars ___ you are over 18. ​A. If​B. unless 5. In my country, ____ you cannot speak English, it’s hard to get a good job. ​A. if​B. unless 6. She’ll fail the exam if she ___ study. ​A. if​B. doesn’t 7. We’ll be late ____ we leave soon. ​A. if​B. unless 8. ___ I am not feeling better tomorrow I will go to the doctor’s. ​A. Unless​B. If 9. ____ you do not make the payment in time, your car will be confiscated. ​A. If​B. Unless 10. You will lose your job ___ you change your attitude and become friendlier. ​A. unless​B. If 11. She won’t know the truth ___ you tell it to her. ​A. unless​B. if 12. ____ you arrive early, you’ll be able to meet the customers before the meeting. ​A. Unless​B. If 13. ____ she eats healthy food, she won’t lose some weight. ​A. Unless​B. If 14. They won’t arrive on time ___ they finish the work early. ​A. unless​B. if 15. Will she able to eat some cake ___ I put eggs in it? ​A. unless​B. if

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