题目内容：

阅读下面材料，在空格处填入适当的内容（一个单词）或括号内单词的正确形式。

Supermarkets are big stores that provide a wide choice of foods and   1.  products. In the United States, traditional supermarkets  2.  (face) competition from even bigger stores with more choices of fresh and natural foods.

Many supermarkets are chains, stores 3. (own) by one company. Most Americans still spend the most money 4.  (buy)groceries(杂货) at supermarkets. Traditional supermarkets have lost some of their business.  5.  (gradual), many people are changing where they buy groceries. They are also changing the kinds of groceries they want.

New  6.  (compete) are winning business because they are even larger than supermarkets. And they have  7.(low) prices. Wal-mart supercenters sell groceries as well as clothes, electronic equipment and everything else. Competition has also come from stores, 8.  Whole Foods Market, which sell natural foods.

Yet supermarkets are changing too. Many have cut prices. Many are offering more fine foods and organic products 9.  are free of added chemicals and drugs.  10.  2000, Americans have bought more organic food from supermarkets than from any other kind of store.