简述褶皱构造。

Directions: Complete the following passage by using the words in the box. Each word can only be used once. Note that there is one word more than you need.

A. turn      B. eagerly   C. concerned     D. particularly   E. growing         F. changed   G. produced  H. international   I. popular       J. called

There have been a lot of changes in American eating habits in the last ten years. One is the __小题1:__ awareness of the nutritional value of food. Another is an increasing interest in a variety of __小题2:__ foods. Since about 1970, Americans have been more and more __小题3:__ about health. They have begun to notice the ingredients（配料） in what they eat.
When they select food in the supermarket, they __小题4:__ the package over to read the labels carefully. They prefer to eat food that is __小题5:__ without unnecessary chemicals and often choose fruits and vegetables grown without poisons used to kill insects. A small group of Americans, __小题6:__ vegetarians, has decided not to eat meat. They choose a complete diet from other kinds of food because they think that meat products are not good for health.
Also more and more Americans have become interested in food from other countries. They have been going out to international restaurants and __小题7:__ trying unfamiliar dishes. Chinese, Japanese, French, Italian, and Greek cooking as well as many other recipes（食谱）are all __小题8:__ these days in the United States. People to say that Americans ate uninteresting, unhealthy food, but this has __小题9:__ in the last ten years.