Polluted water and increased water temperatures have driven many species to the verge

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Mark the letter A, B, C or D on your answer sheet to indicate the word or phrase
that is OPPOSITE in meaning to the underlined part in each of the following questions

Polluted water and increased water temperatures have driven many species to the verge of extinction

enriched

Contaminated

purified

strengthened

Giải thích

Đáp án: C Polluted= contaminated= ô nhiễm, enriched= làm giàu lên, purified = làm sạch, strengthened=được gia cố.