Bộ 10 đề ôn thi học sinh giỏi Tiếng anh lớp 9 có đáp án (Đề 7)

Everybody knows that cars emit dangerous gases that cause poisonous (61) ________ and cancer, but no one wants to travel on foot or by bicycles

53/97

Everybody knows that cars emit dangerous gases that cause poisonous (61) ________ and cancer, but no one wants to travel on foot or by bicycles

steam

vapor

air

moisture

Giải thích

Chọn đáp án C