61.Eating too much fat canheart disease and cause high blood pressure.

64.一Is that the small town you often refer to?—Right, just the oneI used to work for years.

63.The new buyer identified a dozen new sources for the material, proved to be reliable.

62.The person I trust most is a friendI have been cooperating in business for a long time.

61.Researchers have spent five years collecting datathe study was based.

60.I still remember the daywe first met, during my first visit to the town.

59.The first thingI wanted to do after the exam was totravel around theworld.

58.The reasonhe refused our invitation was that he had to prepare for an exam.

57.This is the very bookbelongs to him.

56.Which is the bookyou bought yesterday?

55.That＇s the doctoron the seriously wounded man.