Questions 19 to 21 are based on the passage you have just heard.

Directions:In this section, you will hear three passages. At the end of each passage, you will hear three or four questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D). Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre.

    19.
  • A Its construction started before World War I.
  • B Its construction cost more than $ 40 billion.
  • C It is efficiently used for transport.
  • D It is one of the best in the world.
    20.
  • A To improve transportation in the countryside.
  • B To move troops quickly from place to place.
  • C To enable people to travel at a higher speed.
  • D To speed up the transportation of goods.
    21.
  • A In the 1970s.
  • B In the 1960s.
  • C In the 1950s.
  • D In the 1940s.