单项选择题

Plastic is the panacea of the ages. Nearly every man-made object (1) (2) of, or at least (3) its very structure, to this wonder compound. Rain slickers, computer terminals, automobile engine parts, coffee cups (and the sugar stirrers too), breast implants, toy soldiers—they are all made up of plastic, or one of its many (4) Since the (5) of civilization, humankind bas been experimenting (6) a multifunctional material—one that had to be equally strong and lightweight—to carry, contain and protect valuables. (7) it could carry, contain and

Read tile following text. Choose the best word(s) for each numbered blank and mark A, B, C, and D on ANSWER SHEET 1. (10 points)19（）

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