2 . A large flood caused by heavy rains and melting mountain snow recently hit America’s Yellowstone National Park. It caused widespread damage and resulted in many changes.

It changed the path of a river popular for fishing and also devastated hundreds of homes, bridges and roadways in nearby communities. It drove more than 10, 000 visitors out of the park. Luckily, no one was reported hurt. However, the park could remain closed for up to one week. The water also washed away camp structures, flooded small towns and cut power to parts of southern Montana and northern Wyoming.

The Yellowstone River was running at a historically high level of 4. 9 meters as it flowed past Billings, Montana’s largest city. The city got its water from the river and was forced to close its treatment plant (工厂) because it couldn’t operate effectively with water levels that high. Billings officials said the city only had a 24-hour supply of water. They were asking people to save water until the river could drop and the plant could restart operations.

Yellowstone officials said, “The northern half of the park is likely to remain closed over the summer. This will greatly affect local economies that depend on summer tourists. But we have faith in the park repairs and economic recovery.”

10 . There once was an ordinary street in the suburbs where no one cared much for their gardens. The lawns were overgrown, the weeds were taking over and the hedges(树篱)_________ needed to be cut back. It looked very terrible. _________ when the neighbors saw their gardens, they just looked at each other and laughed.

It seemed too hard to clear all the gardens and no one could be _________ to make them better because everyone’s garden was equally _________. No one felt it was urgent to change anything. Then a gardener named Bill _________ in the small town. Bill was a _________, hard-working and patient man who started working in the garden as soon as he moved in the street. He took his lawn mower(割草机) out to cut back the grass and pulled out all of the _________. Finally, he took up his gardening and started _________ his hedges, making them look like flowers, plants, stones, balls, etc. It was a huge project but his hard work _________ and his garden looked inviting.

__________ by the beautiful scenery, the neighbors walked by and admired the __________ manicured(修整的) garden. Before long, something __________ happened. One by one, the neighbors started to put in more effort in their own gardens and the sounds of lawn mowers could be heard again. After a few months, the street was transformed from a dirty, __________ collection of houses to a beautiful street that wouldn’t be out of place in a stylish magazine.

One person’s action showed everyone what could be achieved with a little hard work. It’s easy for us to __________ the environment around us because no one else cares about it. Remember what you positively do not only benefits yourself, but also __________ a change to the whole world.