Questions 18 to 20 are based on the following passage. At the end of the passage, you will be given 1S seconds to answer the questions.
Now listen w the passage.
The average number of women in each group is ______.

A．He no longer believes short-range forecasts.
B．He is so fascinated that he decides to study meteorology.
C．He realizes that there is some value in long-range forecasting.
D．He decides to change his forecast.

A．She had worked hard.
B．She had taken a pill.
C．Her body shook.
D．She had thought too much of her exams.