11. We don’t know _____ to put the sofa. A. why B. where C. what D. who 12. No one could tell me _____ to start the engine. A. how B. what C. why D. whom 13. I’ve been studying very hard for my final exams but I always feel _____. A. tired B. calm C. worried D. frustrated 14. She has failed her driving test three times. She feels _____ now. A. stressed B. depressed C. worried D. calm 15. He did very well at the examination this morning so he feels very _____ at the moment. A. sad B. unhappy C. worried D. relaxed 16. On the way home yesterday, his bicycle broke down so he felt very _____. A. frustrated B. excited C. delighted D. confident 17. Minh feels very proud and _____ at the gold medal he has got. A. unhappy B. delighted C. stressed D. strong 18. If you study hard and you feel tired, you had better take a rest and _____ for some minutes. A. encourage B. advice C. relax D. empathize 19. The winner of the contest was given a/ an _____ for her excellent performance. A. bonus B. reward C. fine D. award 20. I don't know what to do to cheer her _____ because she’s just failed her driving test. A. in B. up C. off D. at (helpp)

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