1 Last week, we visited a large factory where they make window glass 8 Special rollers took hold of the sheet at either side and carried it upwards 6 Here some men lowered a metal frame into the liquid 4 They then fed the mixture into a big hot oven 9 Our guide told us that at this stage it was necessary for the glass to cool slowly as this would make it very strong 10 At a height of 30 feet, the sheet of the glass became cool and another. machine cut it into big pieces which workmen stored away together 3 Then they added some broken glass to the mixture as this helps it to melt. :2 We first saw workmen mixing sands and other materials together in the right amounts 5 At the far end of the oven, a stream of liquid glass came out .7 As the frame came up, it pulled away a hot sheet of glass 11 Finally the glass was ready for use____ Last week, we visited a large factory where they make window glass. ____ Special rollers took hold of the sheet at either side and carried it upwards. ____ Here some men lowered a metal frame into the liquid. ____ They then fed the mixture into a big hot oven. ____ Our guide told us that at this stage it was necessary for the glass to cool slowly as this would make it very strong. ____ At a height of 30 feet, the sheet of the glass became cool and another machine cut it into big pieces which workmen stored away together. ____ Then they added some broken glass to the mixture as this helps it to melt. ____ We first saw workmen mixing sands and other materials together in the right amounts. ____ At the far end of the oven, a stream of liquid glass came out. ____ As the frame came up, it pulled away a hot sheet of glass. ____ Finally the glass was ready for use. 1 11 8 6 4 9 10 3 2 5 7