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