Read the following passage and choose the item (a, b, c, or d) that best answers each of the questions about it.
You can recycle many types of glass. Glass food and beverage containers can be reused and recycled many times. (In fact, only bulbs, ceramic glass, dishes, and window glass can’t be recycle )
Glass is made from soda ash, sand, and lime. If it’s thrown away, it stays there indefinitely because glass never breaks down into its original ingredients. To be recycled, glass is sorted by color, crushed into small pieces, and melted down into a liqui Then, it is molded into new glass containers.
lime (n) vôi
indefinitely (adv) vĩnh viễn
sort (v) phân loại
What does the word ‘its’ in line 5 refer to?
glass soda ash sand lime