The Twenty-four Solar Terms shows the relationships between the universe, seasons, climate and agriculture,    1     is a unique creation by Chinese ancestors. In the early development of agriculture people began to explore rules of nature since agricultural     2     (produce) was highly subject to seasonal changes. As the east Asian traditional lunar calendar is a “lunisolar(日与月的)calendar”,     3     is, it’s developed according to the running and operation of the sun or the moon, it can not    4     (full) reflect the circle of the sun.    5    , China is an agricultural society and we have to strictly know the circumstance about the sun operation. With farming completely carried     6    according to the sun, our ancient ancestors added a separate calendar     7     (reflect) the sun cycle. Thus, the Twenty-four Solar Terms that can indicate the changes of seasons and climate     8     (come) into being, and it was used to guide sowing, harvest and other agricultural     9     (activity). Up to now, it     10     (function) as an essential tool to guide farming in China.

Mount Vesuvius is an active volcano located just east of Naples, Italy. It is the only volcano on the continent of Europe that     1     (erupt) in the last one hundred years, though other volcanoes have erupted on islands in the Mediterranean Sea. Vesuvius's earliest     2     (record) eruption is now its most famous. In the year A. D. 79,     3     little or no warning, Vesuvius erupted and completely buried the ancient city of Pompeii. For two days the mountain shot     4     (volcano) material into the air, spreading     5     blanket of ash over the landscape. Pompeii, located seven kilometers from the volcano,     6     (bury) under five meters of ash. The destruction was so complete that it was not until sixteen hundred years later     7     the city was discovered. Evidence of the religion, culture, and everyday life of the Pompeiians, all     8     (leave) behind in the sudden panic of the volcano's catastrophe, are     9     (remarkable) well preserved. And everywhere there are     10     (remind) of its sudden eruption and the shadow of Vesuvius. Even the forms of the citizens remain. Their bodies lie much as they did on the day of their death almost twenty centuries ago.