Use the correct form of the word in brackets to complete the following sentences. 22. People have _____________ that doing puzzles is good for you. COVER 24. There has been an _____________ in the power of their brains. IMPROVE 26. The improvement in the _____________is something that happens naturally. PERFORM 27. It remains _____________ whether puzzles are actually helping to boost brainpower or not. CERTAIN 28. According to _____________, most people sleep less than 8 hours every day. SEARCH 29. The advice passed down to our grandparents may contain some _____________. TRUE 30. A good example is the_____________between being cold and catching a cold. RELATION 31. These high-heeled shoes are _____________ for such rough terrain. SUIT 32. Colds are caused by viruses, so in the _____________ of a virus, you can't catch a cold. ABSENT 33. You're too young. This film is __________________for children your age. APPROPRIATE 34. _____________ now think that we may have viruses in our bodies already. SCIENCE 35. In cold weather, for example, blood vessels in the nose get smaller to stop heat escaping. _____________, this also allows the cold virus to attack the nose or throat more easily. FORTUNATE 36. Victoria Falls in Africa is one of the most _____________sights in the world. SPECTACLE 37. It's also an _____________ place for water sports. CREDIBLE 38. We need you to provide an accurate _____________ of the situation. DESCRIBE 39. On arrival, it's the noise that makes the greatest____________. IMPRESS 40. The _____________ landscape is also well worth a visit. SURROUND 41. There's a post office a bit _____________down the road. FAR 42. Six months after the accident, he still has _____________ walking. DIFFICULT 43. I can't play tennis that well because I'm a _____________. BEGIN