Tom lives in the area affected by air pollution, so he has a breathing problem.

5/19

If John didn't live in the area affected by air pollution, he wouldn't have a breathing problem.

Tom will have a breathing problem if he lives in the area affected by air pollution.

If Tom lived in the area affected by air pollution, he would have a breathing problem.

Tom won't have a breathing problem if he doesn't live in the area affected by air pollution.

Giải thích

Đáp án đúng: A

Dịch: Nếu Tom không sống ở khu vực bị ảnh hưởng bởi ô nhiễm không khí, anh ấy sẽ không gặp vấn đề về hô hấp.