I/ Complete the sentences 1.if/ you are overweight, 2. unless you brush your teeth twice a day,your teeth wouldn’t be damaged 3. Please marinate beef in oil for half an hour or the meat gets dry 4. Because potatoes have thick bark, 5. Although this learner has learned English for 4 years, 6. If you eat too much fast food, 7. Unless you take more exercises, 8. Food should be stewed or 9. Because the American Broadcasting Company (ABC) aired a live programme (featuring the magnificence of Son Doong) on "Good Morning America", 10. Tour guides who 11. We must thank to cave explorers who 12. May Day when 13. Trainers are people who 14. Learners are not fluent in language and this is why 15. I picked up some Japanese last year when 16. This is the university where 17. The young enjoy exploring universe which 18. Astronauts are people who 19.The rescue workers who 20. The victims of war who 21. It is not easy to forget the day when giúp mình nhanh với ạ mình cần trc 3h45 á