Are you familiar with large supermarkets?   If so, then you probably know that (   1   ) everything in the supermarket is in a container.   Most food is in containers.   Even fresh (   2   ), fruit, and vegetables are sold in plastic containers.   In fact, almost everything at the supermarket is in a bag, a box, a bottle, a jar, a carton, or a (   3   ).

 This kind of packaging system is necessary at large supermarkets.   Supermarkets buy large quantities of everything.   Products (   4   ) be protected during transportation and they must (   5   ) (   6   ) shelves for long periods of time.   Containers, therefore, protect the products.   Containers have (   7   ) function, too.   They give information about (   8   ) product---names, weights, materials, and contents, and sometimes pictures of the products.   This information is (   9   ) on labels or on the containers (   10   ).