A. To call for more people to join in volunteer work.

　　B. To carry out researches on Native Americans.

　　C. To invite more people to be members of the museum.

　　D. To raise more donations for the museum.

　　()1. Which of the following statements describes the life and culture of Native Americans correctly?

　　A. They are good at pottery and beadwork.

　　B. Most of them live in tipis.

　　C. They greet others by saying, “How.”

　　D. They like designing offensive cartoons.

　　()2. If you join NMAI, you can enjoy the following benefits except ________．－color quarterly magazine －only discounts at all Smithsonian－only discounts for buying in NMAI Museum Stores－rated Mitsitam Native Foods Café()3. Regular membership fee

　　of the NMAI is about ________． If this happens often you probably have a pretty capable working memory and a sharper brain, new research suggests.

　　This mind wandering, it seems, actually gives your working memory a workout. Working memory is the mental work space that allows the brain to juggle multiple thoughts at the same time. The more working memory a person has, the more daydreaming they can do without forgetting the task at hand.

　　Researchers studied groups of people from the University of Wisconsin－Madison community, ranging in age from 18 to 65. The volunteers were asked to perform simple tasks, like pressing a button every time they took a breath or clicking in response to a letter popping up on a computer screen; these tasks were so easy that their minds were likely to wander, the researchers figured.

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