March 21 is World Sleep Day, an international annual event, which 【小题1】 (intend) to be a celebration of sleep and a call to pay attention to sleep, for sleepiness and sleeplessness are a 【小题2】 (globe) problem that threatens health and the quality of people’s life.

It is a day 【小题3】 people around the world care about their sleep and also ask 【小题4】 (they) a lot of questions about sleep.

Why do we need sleep? Nobody can give a perfect answer 【小题5】 this question. However, tests have shown that lack of sleep over about four weeks 【小题6】 (lead) to a strong drop in body temperature, great weight 【小题7】 (lose) and finally sickness.

Different people need different amounts of sleep. Eight hours a night is considered the average amount of sleep. The least number of sleeping hours 【小题8】 (advise) by doctors is ten hours for primary school students, nine for junior high school students and eight for senior high school students. We find, quite 【小题9】 (interesting), some people seem to get along well with very little sleep at night. For example, Thomas Edison said that sleep was a waste of time. He did, however, take naps during 【小题10】 day. And Albert Einstein said that he needed ten hours’ sleep a night.

Do you have some of the most useful suggestions for a good night’s sleep?

On the traditional Chinese lunar calendar, a year is divided into 24 solar terms. The solar terms 【小题1】 (create) thousands of years ago to guide agricultural production.

White Dew (Bailu) is the 15th solar term and indicates the real beginning of cool autumn. The temperature declines 【小题2】(increasing) with the white dew on the grass and trees seen in the morning. In many places of China, the air is clear, with the sky in great 【小题3】(high) and the clouds in peace. The gentle wind can often be felt blowing.

Back in the old days, gathering the white dew from plants was a Chinese tradition. Bencao Gangmu, a Chinese herbology document, 【小题4】(write) by Li Shizhen over 400 years ago says the white dew can be used as tea which 【小题5】(taste) sweet with its pleasant smell and has cooling effects on the body and keeps people healthy.

In Southern China, people tend 【小题6】(eat) longans on the day. They believe the fruit can bring good luck, make people stay calm 【小题7】 cure some typical conditions.

Yu the Great was an admired ruler in ancient China, 【小题8】 was famous for controlling floods, his governance of the Xia Dynasty, and his moral character. When 【小题9】 comes to White Dew every year, 【小题10】(fisherman) in Jiangsu and Zhejiang provinces will hold a week-long ceremony to honor Yu the Great.

Tomato-throwing Festival is considered one of the 【小题1】 (happy) of all the festivals around the world. Every year hundreds of tons of tomatoes get ruined in the happy activities in Spain. However, Spain's famous Tomato-throwing Festival is now 【小题2】"pay-to-join" event. This is because of the 【小题3】(country) poor economy.

The town of Bunol is charging tourists $13 【小题4】 Tomato-throwing Festival. However, all 15,000 tickets for the hour-long tomato fight 【小题5】(sell) so far. Town residents will get free tickets. It costs 150,000 euros for Bunol 【小题6】(organize) the Tomato-throwing Festival. The town must pay for the tomatoes 【小题7】are used in the sreet battles. It is always flooded with juice.

Tourists from all over the world visit the Tomatina. Bunol's mayor said 【小题8】was difficult to control the number and that the charge was for financial and 【小题9】(secure) reasons. The festival began after the end of World War II because of a fight between teenagers near a vegetable market, which ended with the kids throwing tomatoes at each other 【小题10】(excite).