( ) 1. What's the purpose of writing this passage?
A. To tell a story about Charles Darwin.
B. To introduce the form of the Galápagos.
C. To discover the secrets of island animals.
D. To explain the importance of the environment.
( ) 2. In which place would the sentence "This is often the way plants and animals come and live on islands." best be placed?
A. ① B. ② C. ③ D. ④
( ) 3. What can we learn about "natural selection"?
A. It proved islands are the perfect home to different animals.
B. It was used to describe some special animals from the Galápagos.
C. It announced the result of the research on certain island animals.
D. It was named after the islands where Darwin formed his discovery.
( ) 4. What can we infer from the passage?
A. Mainland animals never evolve for there are fewer dangers around.
B. Big island animals can get smaller since they have limited food on islands.
C. Darwin first mistook different finches for totally unrelated kinds of animals.
D. The Galápagos were considered as a natural laboratory to do special research.