Questions 16 to 18 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.

    16.
  • A To investigate how being overweight impacts on health.
  • B To find out which physical drive is the most powerful.
  • C To discover what most mice like to eat.
  • D To determine what feelings mice have.
    17.
  • A When they are hungry.
  • B When they are thirsty.
  • C When they smell food.
  • D When they want company.
    18.
  • A They search for food in groups.
  • B They are overweight when food is plenty.
  • C They prefer to be with other mice.
  • D They enjoy the company of other animals.