Complete the following sentences with proper prepositions: 1.We’ll buy a smaller house when the children have grown up and left home. 2. The computer isn’t working. It broke up this morning. 3. My headaches have been much better since I gave up drinking coffee. 4. I turned back their offer because they weren’t going to pay me enough money. 5. It was not a problem. We looked up his number in the telephone book. 6. Helen takes her mother in many ways. 7. We need to set ________ early tomorrow. 8. The plane took off very quickly. 9. Anne’s leaving ________ London tomorrow morning. 10. Your friend is always complaining _______ her job. 11. If there was a technical failure, Gagarin might never get _______ to the Earth. 12. Courses like shoemaking or glass engraving provide people ________ practical skills they can do with their hands. 13.She is famous _______ her beautiful face and sweet voice. 14. We are all aware ________ the importance of the environment protection. 15. His opinion is different _________ mine. 16. If you don’t pay attention _________ the teacher, you won’t understand the lesson. 17. I’m not familiar____ his name, but his face seems familiar____ me. 18. We were very grateful_______ our friends for all of their assistance 19. No one knew precisely what would happen ______ a human being in space. 20..How would the mind deal ______ the psychological tension?