※ 다음 글을 읽고 물음에 답하시오.
People plants and animals need ⓐ (to, air, clean, breathe.) ① They drive cars and the cars give off fumes. ② The fumes from cars, buses and trucks pollute the air. ③ The dirty air makes people, plants and animals sick. ④ Electricity doesn't make fumes, so people began to make electric cars. ⑤