A. Choose A, B, C or D to fill in each of the corresponding gaps. Babies sleep for up to eighteen hours a (26)................................... Mrs. Thatcher and Napoleon both said they only (27).................................. to do it three or four hours a night. Sleep. No one can live without it. But how much do we really need? Research by the National Sleep Foundation (28).................................. Washington says that we all need eight hours’ sleep every night. Scientists have found that people (29).................................... sleep for less than six and a half hours a night are more often ill (30).................................. people who sleep for eight hours. Going without sleep also increases the chance of serious illness. ‘Workaholics’ who sleep (31).................................. less than five hours often die young, and do worse at work. The scientists found that on average adults (32).............................. for seven hours a night, with thirty-two percent sleeping less than six hours. It also (33).......................... that the idea that we need less sleep as we get older is completely untrue. ‘People have (34)............................. idea how important is to their lives’ Dr. Thomas Roth, director of the Foundation says. ‘Good (35)............................. needs good sleep’. 26. A. day B. week C. month D. year 27. A. need B. needs C. needed D. needing 28. A. at B. in C. on D. under 29. A. what B. which C. who D. where 30. A. than B. as C. of D. for 31. A. of B. for C. with D. at 32. A. to sleep B. slept C. sleeping D. sleep 33. A. to say B. say C. says D. saying 34. A. not B. no C. none D. nor 35. A. health B. healthy C. healthful D. healthily

TÌM 10 LỖI SAI VÀ GIẢI THÍCH

Why do some people back on when faced with a threat, while others stand up to it? When giving a difficult task, why do some people see it through while others give up? It all comes down to personalities. But where does that come from? Some scientists believe that most of traits are inherited. The others take the opposite view: personality, they say, is formed by our environment and parents do not pass it on in their children. The truth is probably anywhere in between. Some traits are clearly determined by your environment: However your genetic background, if you grow up in Sweden, you'll probably speak Swedish. On the other hand, when it comes to traits like the colour of your eyes or your blood type, it is clear that genetics alone accounts for them. There are also traits which are partly inherited but partly shaped by environment: your weight, and even your height and skin colour, are examples. Of course, genetics and the environment together are not the total picture. Your free will - your ability to take decisions - is also a factor in shaping your identity, but how big a factor? You'll have to make your own mind up for that!