TEST 155Cambridge IELTS 13 · Questions 27–30Traffic-Light Nutrition LabelsChoose TWO letters, A-E.Questions 27 and 2827–28Which TWO things surprised the students about the traffic-light system for nutritional labels?Aits widespread useBthe fact that it is voluntary for supermarketsChow little research was done before its introductionDits unpopularity with food manufacturersEthe way that certain colours are usedChoose 2 — 2 to go.Questions 29 and 3029–30Which TWO things are true about the participants in the study on the traffic-light system?AThey had low literacy levels.BThey were regular consumers of packaged food.CThey were selected randomly.DThey were from all socio-economic groups.EThey were interviewed face-to-face.Choose 2 — 2 to go.