1. the people of africa (believe) in various religions. 2. 20 years ) a long time to spend in prison for theft. 3. the ) too steep for my grandmother to climb. 4. cathay (be) an asian airline. 5. ) the key to success. 6. ) you feel miserable. 7. a loaf of ) more now than it did ten years ago. 8. i think olive ) a lot of flavour to cooking. 9. the ) every wednesday in the boardroom. 10. it is said that lightning ) in the same place twice. 11. my favourite ) the ones with red and white stripes. 12. all the members of ) together in the staff room. 13. some people think ) so romantic. 14. ) too much sugar in my tea. 15. ) a lot of theoretical study. 16. ) things towards the centre of the earth. 17. good ) all you need to be a model. 18. a crew of over five ) in most commercial aeroplanes. 19. decorating a ) a lot of trouble. 20. your ) nicely with this blue top.