Choose the correct answer A, B, C or D for each of the gaps complete the following text.

Last month Lan's father (1) ………… her to a glass factory. They visited the recycling workshop where the broken glass was smashed (2)…………… small pieces, and the glass was washed with a particular detergent liquid. After that, it was dried up and mixed (3)……….. some chemicals. The mixture was put into a very (4)………… temperature furnace to melt into liquid. The workers in the factory used long pipes (5)……… the liquid into a variety of shapes. All the glassware looks nice. Lan was very impressed by the journey.