The Collectors

The authorities are making efforts for the ____________...

Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
The authorities are making efforts for the ____________ of the environment.
A. pollution
B. contamination
C. preservation
D. damage
Pollution (n): ô nhiễm
Contamination (n): nhiễm bẩn
Preservation (n): bảo tồn
Damage (n): thiệt hại
Đáp án C.
 

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