in front of everyone from 5-year-olds to senior citizens! The more I present, the more I notice that I am changing minds. I have watched people go from dismissing bats as "disgusting" to truly understanding them and advocating their protection.

Right now, I'm thinking of becoming a marine biologist (海洋生物学家) someday. As long as I'm helping animals, I'll be happy.

21. When the author was little, bats _____.

A. lived mainly in the south of America

B. were well protected in upstate New York

C. did great harm to the natural environment

D. existed in large quantities in upstate New York

22. The underlined word "vanished" in Paragraph 2 can best be replaced by _____.

A. reproduced

B. disappeared

C. starved

D. expanded

23. Paragraphs 3 and 4 mainly talk about _____.

A. the author's efforts to help protect bats

B. how the author started Buddies for Bats

C. why the author did a radio show on bats

D. the difficulty the author had in educating people

24. What can we infer about the author's presentation?

A. It was ignored by the audience.

B. It was far from satisfactory.

C. It was effective.

D. It was boring.

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