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