12. Mo was lazy. She failed the exam. (so/ because) → → 13. It rained cats and dogs last night. I visited Mo (Although/ but) → →14. He got up late. He missed the bus (so/ since) → → 15. The test was very difficult. We could do it (though/ but/ however) → → → 16. Mo was tired. She watched T.V late last night (since/ so) → 17. Mo stayed up late last night. She went to school on time. (though/ but/ however) → → → 18. He didn’t go to school. He was ill. (therefore/ because) → → 19. She got bad mark. She didn’t prepare the old lesson. (so/since) → → 20. My mother is a farmer. My father is farmer. (both ….and…) → 21. Mo likes fish. I like fish.(both …and…) → 22. She killed her husband. She killed her son. (not only ….but also). → 23. She is stupid. She is careless. (not only…but also) → 24. Tom didn’t go to the party. I didn’t go to the party. (neither…nor) → 25. He failed the exam. He was very lazy. (because/ so) →

Tính khối lượng muối Kali clorua kcl có có thể tan trong 150 gam nước ở 20 độ c để tạo thành dung dịch bão hòa biết độ tan KCL ở 20 độ c là 34 gam