Câu hỏi :

Read the followingpassage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer for each of the question.

A. To demonstrate the interdependence of different species 

B. To emphasize the importance of food resources in preventing mass extinction. 

C. To illustrate a comparison between organisms that live on the land and those that live in the ocean 

D. To point out that certain species could never become extinct.

* Đáp án

* Hướng dẫn giải

    plankton: sinh vật phù du.

Đáp án là A. Ý trong bài: Mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species.

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