Any change in one part of an ecosystem can cause changes in other parts

Câu hỏi :

Read the following passage, and mark the letter A, B, C, or D on your answer sheet to indicate the correct word for each of the  blanks from 19 to 28.

A. out      

B. in          

C. go          

D. fly

* Đáp án

A

* Hướng dẫn giải

Đáp án A

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