Even though the sun is     1    (bright)shining, telling whether it is morning or night is impossible. I’m above the Arctic Circle,    2    in summer the sun never sets. I’m in the remote far north of Sweden in Sarek National Park, a place with no roads or towns.

Around 9,000 years ago,reindeer began to arrive. Following the reindeer     3    (be) the Sami people, who made this territory their home. Getting here is quite     4    (difficulty). In 1909,Sarek was made a national park in order to keep the land in     5    (it) natural state. Though the Sami     6    (allow) to continue their traditional way of life in the park,no one else can live here.

For hundreds     7     years,looking after reindeer was a way of life for the Sami. They used the reindeer’s meat for food,their bones for tools,and their skin for making clothes and tents. Since reindeer were always on     8     move,the Sami would pick up their tents and accompany them.

After breakfast, I pack my bag and set out again. Since I must carry all of my food and     9     (supply)with me, my bag weighs about 30 kilograms.     10    (stay) in such a beautiful and wild place makes me feel blessed to be alive. Here I am enjoying this great adventure.

Xuan paper, known as one of the Four Treasures of Study, first came into     1     (exist) in Xuan Prefecture in the Tang dynasty. The traditional skill of making the paper     2     hand has been passed down through generations. The process takes as many as 108 steps, all of     3     require a level of delicacy.

Take papermaking master: Zhou Donghong for example. He uses a fine screen to filter (过滤) a mixture of water and fibers. He lifts it up, and it’s a sheet of paper. It takes him and his partner only 15 second     4     (form) and shape it, but they’ve devoted     5     (they) to perfecting the skills for decades.

“There are a lot of     6     (trick)of filtering the fibers, and timing is     7     most difficult part of all. We have only one chance to filter the right amount of fibers, and only the proper weight guarantees the paper neither too thin nor too thick, and the margin (差额) for error is     8     (extreme) small,”said Zhou. With just the right degree of thickness, top quality Xuan paper holds ink tightly.

The skill of papermaking,     9     (recognize) as a national treasure, has also proven to be an international one. We felt a great sense of pride as it was listed as a world intangible culture heritage (非物质文化遗产) by UNESCO in 2009. Since then, in Jingxian County, Xuan papermaking     10     (teach) in schools.

The first creature     1     (orbit) our planet was just 2 years old. Her name was Laika. She was a good dog.

Her 1957 flight paved the way for space     2    (explore) when scientists wondered     3     it was lethal (致命的) for living things.

Humans are born explorers. Since the dawn of civilization, we     4    (try) going over the horizon to find food or more space, or just to see what’s beyond those trees or mountains or oceans. Our ability to explore has reached new heights. Airplanes could shorten distances, simplify travel and show us Earth from     5     new aspect. By the middle of the last century, we aimed even     6    (high).

Our first steps into space began. Laika     7    (follow) into orbit four years later by the first human, Yuri Alekseyevich Gagarin. Space travel is nothing like that in the movies. Getting from A to B requires complex calculations     8    (involve) inertia (惯性) and gravity. Space is also dangerous. More than 20 astronauts have died while doing their jobs.

That hasn’t stopped people from signing up and blasting off. NASA’s Apollo program has ended     9     private companies are readying their own space programs. A company     10    (name) Space X is hoping to land civilian astronauts on Mars. Maybe you'll be a member of them. Don’t forget to bring your dog.