Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Câu hỏi

This mangrove forest is of _________ importance. There are many plants and animals living here.

A. essential

B. biological

C. alternative

D. endangered

Đáp án
B. biological

Câu hỏi thuộc Bài tập:

E11- GS- Unit 10- Test for unit