Asimov began having his stories ______ in science magazines in 1939.

   A. publish    B. published    C. publishing    D. to publish

Every person needs water and a diet of __36_ foods. These foods should contain some fat, some fiber, a little salt and so on.

People need energy  37 . They eat different kinds of food which change into _38___. The energy is __39__ in calories. Even when you  40 , you are using energy – about 65 calories an hour.  41__  you are at school, or walking home, your body is burning up 100 calories an hour. When playing football or basketball, you  42  be using 400 calories an hour. On Sports Day, during the relay race, you will use most of all,  43  as much as 650 calories an hour.

The Chinese diet is considered to be the healthiest in the world. It contains a lot of fruit and green vegetables. It is  44  in fiber and low in sugar and fat. The Chinese eat less sugar than many other countries in the world. That is  45  lots of people in China have healthy white teeth.

People in the Western world do not eat  46  healthy foods. They eat  47  fat and sugar  48   don’t take enough  49 . Because of this, they  50  weight very easily. Their diet contains a lot of fat in the  51   of potato crisps, potato chips, __52_, cream and chocolate. They eat a lot of sugar which exist in cakes, soft drinks,  53  and so on. The result is that many of them become fat.  54  some have bad teeth. In some parts of Britain, one person in ten,  55  the age of thirty, has no teeth left.

36.A. healthy   B. health       C. cheap       D. expensive

37. A. for life   B. live       C. to live with   D. for a living

38. A. fat      B. energy       C. power       D. strength

39. A. measuring  B. taken    C. measured   D. measure

40. A. are asleep  B. fall asleep   C. go to sleep      D. go to bed

41. A. While   B. During   C. As    D. If

42. A. must   B. can    C. need    D. might

43. A. surely   B. usually   C. perhaps   D. hardly

44. A. rich   B. poor    C. good    C. bad

45. A. how   B. why    C. what    D. that

46. A. so     B. such    C. quite    D. very

47. A. much too  B. many too   C. too many   D. too much

48. A. and     B. but        C. so       D. because

49. A. exercises  B. food    C. work    D. exercise

50. A. put on   B. gain on   C. get on    D. put up

51. A. type   B. form    C. kind    D. sort

52. A. vegetables  B. tomato  C. butter   D. rice

53. A. sweets   B. sweet    C. candy bar   D. sweet thing

54. A. But   B. Or    C. And    D. So

55. A. at    B. for    C. with    D. by

�. The possibility never occurred to me ________ I would unexpectedly enter such a big band and work in Wall Street.

  A) when        B) that              C) /              D) how

. These students will graduate from the university next summer, ________ they will have studied here for four years.

  A) by then        B) by that time     C) by the time      D) by which time

�. While teaching students, teachers should take into consideration _________ students develop at different rates.

  A) the fact that      B) since              C) as long as         D) despite of

�. Information has been put forward ________ more middle school graduates will be admitted to universities.

  A) while        B) that              C) when           D) as

. ________ we’ll go camping tomorrow has kept us all excited the whole day.

  A) If            B) Whether          C) That        D) Where

. Two hundred dollars ________ a small price to pay for the secondhand refrigerator.

  A) have been      B) has been        C) are            D) is

. Mary is barely a diligent girl, as it is the fourth time she has been sleeping in class, ________?

  A) is she          B) isn’t she         C) isn’t it         D) hasn’t she

14. The research is so designed that once ____nothing can be done to change it.

　A) begins         B) having begun　   C) beginning       D) begun