The Iditarod Trail Sled Dog Race is Alaska’s annual sporting event. The race starts in Anchorage and finishes about 1800km later in Nome,     1     is a small village on the west coast.

In the late 1800s, gold was discovered in many places throughout Alaska. And Iditarod became the     2     (large) place in Alaska with over 10,000 people calling it home. During the summer, the mail, people , and supplies were brought to Iditarod on boats. However, in the winter the rivers were covered with thick ice , and as     3     result, the only way in or out was by dog sled(雪橇).

The need for a winter transport link to and from Iditarod and the     4     (distance) goldfields meant that the dog sled trails(路线) were very important. They were     5     (careful) mapped and maintained. However, by the 1930s, these trails had fallen out of use as specially designed planes started supplying the remote settlements.

That’s when a local woman decided     6     (raise) awareness about the Iditarod trail and its    7     (important) to Alaska’s history. In 1967, she     8     (organize) a short race of about 40 km around the Anchorage area. After that, the race was gradually extended to the full 1800 km.

During the race, mushers(赶狗拉雪橇的人)and their teams of dogs have to brave freezing temperatures, terrible storms, and even dangerous wild animals. An average team will take twelve days to complete the race. These hardships are tough for both mushers     9     dogs , but they are one of the     10     (reason) why the Iditarod is so famous.

In the middle of the 19th century, the British were busy     1     (explore) the four corners of the world. Explorers would return in their sailing ships with stories of     2     (attract) places and people. They would also bring back samples(样本) of newly discovered animals and plants     3     had never been seen in the western world before. In 1840, gardens at Kew Park in southwest London were developed so these newly discovered plants could grow.     4     (make) them flourish (茁壮成长) in England’s cold and frosty weather, special buildings     5     (design) at that time, and they could maintain the correct heat and humidity(湿度). One was called the Temperate House.

Opened in 1863, the Temperate House was one of the very first     6     (glasshouse) to be built. It has been home to some of the rarest, most exotic(奇异的) and threatened plant species in the world. The Temperate House, whose walls are made from squares of glass,     7     (cover) 4,880 square metres. This allows the sunlight and     8     (warm) to flood in whenever the sun is shining. It was closed to the public in 2013 and 500 plants were taken out of the building and rehoused.     9     has taken over five years to replace much of the original iron and woodwork. The Temperate House has reopened now. The 500 plants that were taken out have been put back,     10     9,500 plants being added.

A fan can drive summer heat away and help bring a cool breeze（微风）．Since ancient    1    (time)，the Chinese fan has been carrying artistic and unique    2    (nation) style．China has always been regarded    3     “the kingdom of fans”．

The fan first    4    (appear) in China about 3,000 years ago，in the Shang and Zhou dynasties．However，the fan in the early period was used as the symbol of etiquette（礼仪），    5    it was called“the fan of honor”．

After the Qin and Han dynasties，the main shapes of fans were square，round and hexagon（六边形）．The materials    6     (use) to make fans were mainly silk．Because the silk fans were often used in royal court，people called them“court fans”．The person    7    held the silk fan always appeared gentle．

During the Sui and Tang dynasties，the common fans were round fans，feather fans，and some paper fans．The folding fan    8     (gradual) became popular after the Song dynasty．In the Ming and Qing dynasties，the folding fan was popular in Zhejiang，Suzhou and Sichuan．Then the    9    ( popular) of writing poems and drawing pictures on the cover of a fan was rising．Then this skill    10    (introduce) to Europe and became popular all over the world．