题目内容：

In National Museum of Natural History in Washington, D.C., visitors have a rare chance to enjoy a world filled with hundreds of living butterflies. It’s an e   1.  exhibition.

It p  2. a close look at butterflies. Dan Babbitt,  one of the l  3.  of the museum says visitors can get very close to the butterflies to learn about their i 4.    .“Our purpose is to c 5.  people to the natural world. We have found that using animals and insects is an amazing way to do that.” Babbitt says butterflies are important to the e   6. for several reasons.

“One big reason is because of pollination（授粉）. They will t  7.   from flower to flower, taking pollen(花粉) from one flower to another. So we won’t have a number of fruit that we like to eat w   8. butterflies.”

“We have butterflies from all over the world” he says. “And have already s  9.  about 5,000 or so different kinds.” He a   10.  that the museum’s goal for the next five years is to let more people learn more about butterflies .