题目

more than nine million american
More than nine million American children go to summer camp to spend their summer holidays.Children at all kinds of camps can meet new friends and learn new skills.Summer camp can also develop the children’s independence when they leave parents,friends and teachers.Some children go to camp during the day but return home at night.Others stay at camp all day and all night.Most children who attend camp are 16 years old.There are about nine thousand kinds of camps for children with different interests in the United States.A camp called Roughing in California has traditional activities for children and teenagers.Another special camp where teenagers can learn to dive into the water with breathing equipment is very popular.They also study the ocean environment.The best-known camp for young artists is the art camp.Some older children like wilderness adventure camps.Each year,more and more children go to computer camps,especially the children who love science.

提问时间：2020-10-10

答案

答案应该是D,B,D,C,C.