Circle A. B. C or D to indicate the word(s) CLOSEST in meaning to the underlined word(s).

Câu hỏi

Many athletes feel the effects of air pollution during outdoor exercise.

A. contaminant

B. contamination

C. purity

D. hygiene

Đáp án
B. contamination

Câu hỏi thuộc Bài tập:

E11- Unit 3- Practice 5