Bộ 3 Đề kiểm tra Unit 8 - Tiếng anh 10 iLearn Smart World có đáp án (Đề 1)

Traffic fumes contribute greatly to air ______________ in this city.

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Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

Traffic fumes contribute greatly to air ______________ in this city.

pollution

pollute

polluter

pollutant

Giải thích

Chọn A