6. Hoa has a lot of friends as she is so ____________ (FRIEND, friendly, friendliness, friendship) 7. Viet Nam is interested in saving _____________ resources. (nature, naturally, natural) 8. We should prepare food ________________ before cooking. (care/careful/ carefully/ careless) 9. I like this website because it is .........for me. (Use, useful, useless) 10. Playing tennis is one of his favorite___________. (ACT, actor, acting, action) 11. He said “Good morning” in the most__________way. (FRIEND, friendly, friendliness) 12. There’s no easy___________to this problem. (SOLVE/solution) 13. He always drives more________at night. (care/careful/ carefully/ careless) 14. Does this__________suit you? (ARRANGEMENT, arrange) 15. He’s a very_______________carpenter. (SKILL, skilled, skiful, skifully)