Stephen Hawking was a British scientist. Many people think he was one of _______ scientists in the 20th century. On March the 14th, 2018, the world-famous scientist _______ in Cambridge, the UK. As a scientist, Hawking was best known for _______ black holes. He thought that the universe started with the Big Bang and will end in black holes.

Hawking also wrote books _______ more people understand the universe. A Brief History of Time (《时间简史》) is one of _______ popular books.

However, millions of people admire Hawking not only for his talents. They also admire him _______ his strong will encourage them a lot.

_______ the age of 21, Hawking first noticed something wrong with himself. _______ he was found to have motor neuron disease (运动神经元病). He _______ not speak, breathe or move without the help of machine, and doctors said he might die before 23.

At first, Hawking became very upset. But after he came out of hospital he suddenly realized that there were lots of things he could do. Then Hawking found ________ job at Cambridge University as a professor. Hawking’s story shows that you should not lose hope, no matter how bad your situation is. Hawking is a real hero.

Probably you have seen the photos of the Grand Canyon. But you must go there ________ to feel its size and beauty. The Grand Canyon is one of the greatest ________ wonders of the world.

The Colorado River made the Grand Canyon over millions of years. Slowly, the river cut down ________ hard rocks. At the same time, the land was ________. Today the canyon is very ________. It’s also very wide, about 20 kilometers. And ________ its height, there are different kinds of plants and animals on both ________ of the canyon.

The canyon looks different at different times of the day, and ________ different seasons and weather. Whenever you see the Grand Canyon from the top ________ the bottom, it ________ an experience that you will never forget.

In the sea there are many islands. In its warm water there are some little ones. We call them “coral Islands” (珊瑚岛).

A coral island is very nice to look at. It looks like a ring of land(一圈陆地) with trees, grass, and flowers on it. One part of the ring is open to the water. There is a little round lake inside the island.

If you look into this lake, you will see beautiful coral. You may think they are flowers. If you look at a piece of coral, you will see many little holes in it. In each of these holes a very small sea animal lives. These sea animals make the coral.

They began to build under the water. Year after year, the coral grew higher and higher. At last it grew out of the water.

Then the sea brought it small trees and something else. After some years, these things changed into earth. Sometimes the wind brought seeds(种子) to this earth. Sometimes birds flew over it and brought seeds to the island.

The little seeds grew. In a few years there were plants all over the island. In a few more years there were trees growing there.

So you see, these islands were built little by little. The workers were very small. Do they not teach us a lesson? Can you think what the lesson is?

Florence Nightingale was     36     on 12th May 1820. In 1851, she was trained     37     a nurse. Three years     38    , she went to     39     British military hospital so that she could help British soldiers. Before she arrived, many soldiers died in the hospital     40     it was dirty. Florence Nightingale worked hard to make the hospital clean and save soldiers’ lives. When she returned     41     Britain in 1856, she became a national     42    . Florence Nightingale     43     several books about nursing. And she also     44     the school to train nurses. She died in London on the 13th August 1910, when she was ninety     45     old.