(cosx-1)^2=sin3x-1 Giải giúp mik vs ạ

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Use the correct form of verbs in brackets. 1. In all the world, there (be)_______ only 14 mountains that (reach)_____ above 8000 meters. 2. We just (decide)______ that we (undertake) ______ the job. 3. I knew that this road (be)_____ too narrow. 4.Tomorrow I'm going to leave for home. When I (arrive)_____ at the airport, Mary (wait)_____for me 5. That book (lie)_____ on the table for week. You (not read)_____ the TV set. 6. David (wash)_____his hands. He just (repair)____ the TV set. 7. We never (meet)_____ him. We don't know what he (look)_____ like. 8. The car (be)_____ ready for him by the time he (come)_____ tomorrow. 9. On arriving at home I (find)_____ that she just(leave)_____ a few minutes before. 10. It (rain)_____. We can't do anything until it (stop)_____. 11. That evening we (stay)_____ up to talk about the town where he (live)_____ for some years. 12. Half way to the office Paul (turn)_____ round and (go)_____ back home because he (forget)_____ to turn the gas off. 13. He used to talk to us for hours about all the interesting things he (do)____ in his life. 14. You know she (stand)_____ looking at that picture for the last twenty minutes. 15. She (have)_____ a hard life, but she's always smiling. 16. My sister (see)_____ for you yesterday. 17. Christopher Columbus (discovere)_____ American more than 500 years ago. 18. He fell down when he (run) towards the church. 19. While her husband was in the army, Mary (write)_____ to hime twice a week. 20. Ask her to come and see me when she (finish)_____ her work.