Passage One Questions 26 to 28 are based on the passage you have just heard.

A．A community of plants.
B．A community of animals.
C．The study and understanding of plants and animals.
D．The interacting physical factors of the environment.

A．Keeping her topic focused and supporting her opinions with facts.
B．Reading extensively and collecting as much reference as possible.
C．Avoiding sensitive political points and seeking more power.
D．Having discussions with employees and giving them more freedom.