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Some holidays are well-known all around the world. Among them are New Year's Eve celebrations. Also common are days in honor of love and friendship, like Valentine's Day. Each country has its own special holidays, too, often to mark important events In its history. Schools, banks, and government offices all close on days like these. _ (46) A few of them are really very strange.
Of course, they are not strange to the people who celebrate them. Perhaps that is because the celebrations have long traditions. Consider April Fool's Day, for example, No one knows when or why it began. Today it is celebrated in many countries-France, England, and Australia, among others. On this day, people play practical jokes. _ (47) The ones who laugh are the ones playing the jokes. The people they fool often get angry. Does celebrating this day make sense to you?
Dyngus Day in Poland seems strange, too. On this day, it is traditional for boys to pour water over the heads of girls. Here is the strangest part：They do it to girls they like. Other unusual celebrations take place in a single city or town. A holiday called La Tomatina is celebrated in Bunol, Spain. Every year, in late August, big trucks carry more than 200,000 pounds of tomatoes into this little town. (48) For two hours, people in the streets throw tomatoes at each other. Everyone ends up red from head to toe.
August 10 marks the start of the Puck Fair, an lrish festival with a very unusual tradition. People from the town of Killorglin go up into the mountains and catch a wild goat. (49)
There are also some celebrations that are really strange. In the United States, sometimes one person gets an idea for a new holiday and tries to get others to accept it. Whose idea was Public Sleeping Day? That one is on February 28. It may seem strange, but it sounds like more fun than the one on February9. (50)
Do you like the idea of inventing a new holiday? lf you do, then you will want to mark March 26 0n your calendar. That is Make Up Your Own Holiday Day.
A. Some people have fun imagining new holidays.
B. That is supposed to be Toothache Day.
C. Then begins the world's biggest food fight.
D. They bring him back to town, put a crown on his head, and make him king for three days.
E. Jokes are supposed to be funny, but these jokes do not make everyone laugh.
F. Some of the days people celebrate, however, are less serious.
第6部分：完形填空（第51-65题，每题1分，共15分）
下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。
What Is the Coolest Gas In The Universe?
What is the coldest air temperature ever recorded on the Earth? Where was this low temperature recorded? The coldest recorded temperature on Earth was -91℃，which ____ （51）in Antarctica（南极洲）in 1983．
We encounter an interesting situation when we discuss temperatures in ____（52）.Temperatures in Earth orbit（轨道）actually range from about +120℃ to -120℃．The temperature depends upon ____（53）you are in direct sunlight or shade．Obviously, -120℃is colder than our body can ____（54）endure．
The space temperatures just discussed affect only our area of the solar ____（55）．Obviously，it is hotter closer to the Sun and colder as we travel ____（56）from the Sun．Scientists estimate temperatures at Pluto are about -210℃．How cold is the lowest estimated temperature in the entire universe? Again, it depends upon your ____（57）．We are taught it is supposedly ____（58）to have a temperature below absolute zero, which is -273℃，at which atoms do not move. Two scientists, Cornell and Wieman，have successfully ____（59）down a gas to a temperature barely above absolute zero．They won a Nobel Prize in Physics in 2001 for their work-not a discovery，in this case．
Why is the two scientists' work so important to science?
In the 1920s,Satyendra Nath Bose was studying an interesting ____（60）about special light particles（颗粒）we now call photons（光子）．Bose had trouble ____ （61）other scientists to believe his theory，so he contacted Albert Einstein．Einstein's calculations helped him theorize that atoms ____（62）behave as Bose thought-but only at very cold temperatures.
Scientists have also discovered that ultra-cold（超冷）atoms can help them make the world's atomic clocks even ____（63）accurate．These clocks are so accurate today they would only lose one second ____（64）six million years! Such accuracy will help us travel in space because distance is velocity times time(d=vt)．With the long distances involved in space ____（65），we need to know time as accurately as possible to get accurate distance．
51．A. operated B. opened C. offered D. occurred
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