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
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正确答案
试题解析
由第四段“Nor was PVC, the plastic which had been used for bottles since the 1960s, suitable for drinks with gas in them”可知，PVC在1960s就已用于瓶子包装。
