1 . Time capsules(胶囊)are small collection of things or information, that are stored somewhere safe. They can _________ by people in many years and give future people a view of life in the past.

They may have newspaper articles, popular music recordings and photos. Historians can use time capsules to _________ more about people that lived in the past.

One of _________ time capsules was the Detroit Century Box. On December 31, 1900, the city put several photos and letters in a box. The box wasn’t opened _________ people took it out on December 31, 2000.

The things inside the capsule _________ us a look at Detroit in the past. There _________ photos of people and places, as well as letters written by local people. some of them even made _________ for the future. For example, one person predicted that Detroit would have a population of 4 million by 2000. But _________ , the population of the city was 951,000 that year , according to historydetroit. com.

Humans have _________ sent time capsules into space! The US sent two capsules into space on the Voyager Spacecraft (航天器) in 1977. They’re called the Voyager Golden Records. They contain sounds and pictures that show human life and culture. For example, they have __________ by classical musician Beethoven and pictures of plants, insects and landscapes (风景). The Voyager Spacecraft has traveled far away from our solar system (太阳系).It is hoped that aliens might find the time capsules some day and learn about humans.

2 . When you look into the sky at night, you can see a large number of stars. Besides, you can see the _________ too. It’s bright _________ beautiful. People write many songs and poems(诗歌) _________ it.

In the 1960s, some _________ wanted to be the first one to send a man to the moon. America and Russia were in this “space race”. They _________ a lot of money _________ it. The _________ man in space was Yuri Gagarin, a Russian. He went into the space _________ 1961. A few years later, an American spaceship flew to the moon. Neil Armstrong walked out. He was the first man _________ on the moon.

China is interested in the space too. In 2003, Yang Liwei, China’s hero, flew __________ the earth in space.

3 . There are purple clothes, purple handbags, purple bicycles, purple furniture, even purple computers! So purple is one of the most _______ colors today. But in the past, purple was a very expensive and unusual color. Let’s take a look at the rich _______ of the color purple.

Some scientists believe that the first plants to appear on Earth over 500 million years ago ______ looked purple, not green. Plants today are green because _____ use green chlorophyll (叶绿素) to produce energy. _______ these early plants probably used something called retinal, which is a dark purple color.

During the time of the Roman Empire, it was very _______ to make purple dye (染料). The dye came from sea snails(海螺). But 10,000 dead sea snails _______ you just one gram(克) of purple dye...as well as a very bad smell! This _______ purple dye was called Tyrian purple, and it was the preferred _______ of emperors. In the 16th-century England, purple was ________ for the king’s family members. Queen Elizabeth I's clothes were purple, but ordinary people were not allowed to ________ the color.

In 1856, William Perkin, an 18-year-old ________ student, noticed something strange while doing an experiment. The chemicals( 化学药品) he used to clean his instruments ________ with the chemicals he used in his experiment and produced a bright purple color. This ________ led Perkin to start a company using this chemical mixture to make purple dye. The dye was much ________ than sea-snail dye. Thanks to Perkin, now anyone can afford to wear purple clothes.

4 . Do you know anything about the invention of the bar code(条形码)?

A small food store owner found it was _______ to keep records of the product information. In 1948, he asked the Drexel Institute of Technology to solve this _______ . Bernard Silver, a graduate student, was _______ . He and his friend Norman Joseph Woodland _______ to work on it _______, they invented their first working system.

The system did work _______, but it was very expensive and _______ the system didn't work well. If the invention was to become _______ in stores, the problems had to be solved. Finally, Woodland solved _______.

The patent(专利权) for the bar code system was ________ for by Silver and Woodland in 1949, but the patent was not given until 1952. ________ this patent was given, the system was still not popular ________ store owners.

In 1970, a business named Logicon Inc, ________ the Universal Grocery Products Identification Code (食品工业统一码). Marsh Supermarket in Troy was the first store to ________ this bar code reading system. It has become very popular ever since, and now it's ________ in all types of stores all over the world.

5 . China is the home of ______. It has more than 4,000 years’ history. People throughout China drink tea daily. ____ the three major drinks-tea, coffee and cocoa, tea is drunk by the largest ____ of people in the world. Tea from China, along ___ silk and porcelain, began to be known by the world over a thousand years ago and has been an important Chinese export ___.

Tea leaves ___ mainly in the area south of the Yangtze River, in the provinces of Zhejiang, Jiangxi and Fujian, because of the mild ____ and rich soil there. Longjing, Oolong, Pu’er and Tieguanyin are all ____ kinds of tea.

Over the past centuries, Chinese people ____ their unique tea culture. The tea culture includes tea planting, tea-leaf picking, tea making and so on. Tea is ____ a popular topic which is often mentioned in dances, songs, poems and novels.

6 . There are purple clothes, purple handbags, purple bicycles, purple furniture, and even purple computers! So purple is one of the most popular colors today. But in the past, purple was a very expensive and unusual color. Let's take a look at the rich_________of the color purple.

Some scientists believe that the first plants to appear on Earth over 500 million years ago_________looked purple, not green plants. Today are green because they use chlorophyll（叶绿素）to produce energy. _________these early plants probably used something called retinal, which is a dark purple color.

During the time of the Roman Empire(27 BC-476AD), it was very difficult to make purple dye (染料). The dye came from sea snails（海螺). But 10,000 dead sea snails _________you just one gram of purple dye... as well as a very bad smell! This_______purple dye was called Tyrian purple, and it was the preferred _________of emperors.

In 16th-century England, purple was_______for the king's family members. Queen Elizabeth I's clothes were purple, but ordinary people were not allowed to___________the clothes in this color.

In 1856, William Perkin, an 18-year-old science student noticed something strange while doing an experiment.

The chemicals（化学药品）he used to clean his instruments mixed with the chemicals he used in his experiment and produced a bright purple color. This_________led Perkin to start a company using this chemical mixture to make purple dye. The dye was much__________than sea-snail dye. Thanks to Perkin, now anyone can afford to wear purple clothes.

7 . The earliest maps were probably drawn in the Middle East. Some of these maps have______ and they show us the people at that time thought the earth flat(平的). As time went by, the pictures became more detailed and maps were more ______ made. Later on, ancient Greeks(希腊人) used their ______ of maths and science to make maps. Greek maps tell us the Greeks knew the world was ______.

From simple pictures, mapmaking has turned into a science. Maps are made ______ surveying(勘测) land. In the 1900s, people around the world start­ed to share information to make ______ maps. With the help of the photographs taken from the sky and space, maps are now more exactly made than ever. ______ the world is always changing, we will always need new maps.

There are many types of maps, but almost all use ______ and pictures to describe what a place is like when the map is made. A map usually tells what the pictures ______. Some maps may show the whole world. A road map will help you know the ______ from one place to another. Other maps may use pictures to show the temperature and population in different places.