337
트랜스 지방
New York City wants to fight fat. The Board of Health has passed a ban on trans fats in all restaurants.
335
애견 조련사
Americans own about seventy-three million dogs. Many people have problems training their animals. Some are turning to dog expert Cesar Millan.
334
보석 세공
Ancient peoples who lived near the ocean used the shells of sea creatures to make jewelry. Other ancient peoples used materials like small colored rocks and animal bones and teeth.
332

Snow is a form of frozen water. It contains many groups of tiny ice particles called snow crystals. These crystals grow from water particles in cold clouds.
329
시어스 타워
The Sears Tower in Chicago, Illinois, is the tallest office building in the United States. It was built between nineteen seventy and nineteen seventy-four. For more than twenty years, it was the tallest building in the world.
327
가격할인 세일
When a store sells goods or services at a cost lower than usual, it is called a sale. Sales last for a limited time. Then the cost is returned to its usual amount.
325
미국 유학생이 가장 많은 나라
More than five hundred sixty thousand foreign students attended an American college or university during the last school year.
321
새해 결심
January first. The beginning of a new year. As far back in history as we can tell, people have celebrated the start of a new year.
317
단풍나무 시럽
Paul Limberty has been producing maple syrup in Vermont for ten years. The process is called sugaring. Each February, Mister Limberty and his wife, Jennifer Esser, drill holes into their sugar maple trees.
314
의사 되기
People who want to become medical doctors often study large amounts of biology, chemistry and other science. Some students work for a year or two in a medical or research job...