1. The people of Africa ...believe... (believe) in various religions. 2. 20 years ....................(be) a long time to spend in prison for theft. 3. The staircase............(be) too steep for my grandmother to climb. 4. Cat...

1. The people of Africa ...believe... (believe) in various religions. 2. 20 years ....................(be) a long time to spend in prison for theft. 3. The staircase............(be) too steep for my grandmother to climb. 4. Cathay Pacific............. (be) an Asian airline. 5. Happiness.............(be) the key to success. 6. Flu.............(make) you feel miserable. 7. A loaf of bread.............(cost) more now than it did ten years ago. 8. I think olive oil.............(add) a lot of flavour to cooking. 9. The committee..........(meet) every Wednesday in the boardroom. 10. It is said that lightning never........(strike) in the same place twice. 11. My favourite pyjamas.....(be) the ones with red and white stripes. 12. All the members of staff.............(get) together in the staff room. 13. Some people think French.............(sound) so romantic. 14. There.............(be) too much sugar in my tea. 15. Physics.............(involve) a lot of theoretical study. 16. Gravity.............(pull) things towards the centre of the Earth. 17. Good looks.............(be) all you need to be a model. 18. A crew of over five people.............(work) in most commercial aeroplanes. 19. Decorating a house.............(be) a lot of trouble. 20. Your trousers.............(go) nicely with this blue top.