2018年12月四级真题(第二套)

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 Space exploration has serious consequences.
  • B India has many space exploration programs.
  • C There is quite a lot to learn about the moon.
  • D A lot of garbage has been left on the moon.
    20.
  • A It is costly to bring back.
  • B It is risky to destroy.
  • C It is of no use on Earth.
  • D It is damaged by radiation.
    21.
  • A Record details of space exploration.
  • B Monitor the change of lunar weather.
  • C Study the effect of radiation and vacuum on its materials.
  • D Explore the possibility of human settlement on the moon.