5. Train tickets isn't as cheap as bus tickets.10/135. Train tickets isn't as cheap as bus tickets. ______________Nhập câu trả lời ở đây0/3000 ký tựGiải thíchĐáp án: 5. isn't -> aren't Hướng dẫn dịch: 5. Vé xe lửa không rẻ như vé xe buýt.