Bộ 3 Đề kiểm tra Unit 8 - Tiếng anh 10 iLearn Smart World có đáp án (Đề 2)

Traffic fumes contribute greatly to air ______________ in this city.

20/45

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.

pollute

pollutant

pollution

polluter

Giải thích

Chọn C