The next step could be to develop a plastic which could replace tins for food. The problem here is the high temperatures necessary for cooking the food in the container.
26. Plastics of various kinds have been used for making bottles__________.
A. since 1982
B. since the 1970s but only for large bottles
C. since the 1960s but not for liquids with gas in them
D. since companies like Coca Cola first tried them
27. Why is ICIs Plastics Division interested in polyester for bottles?
A. The other things they make are not selling well.
B. Glass manufacturers cannot make enough new bottles.
C. They have factories which could be adapted to make it.
D. The price of oil keeps changing.
28. Why arent all bottles now made of polyester?
A. The price of oil and plastic has risen.
B. It is not suitable for containing gassy drinks.
C. The public like traditional glass bottles.
D. Shop-keepers dislike reusable bottles.
29. Manufacturers think polyester bottles are better than glass bottles because they ______.
A. are cheaper
B. are more suited to small sizes
C. are more exciting to look at
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