2 . 阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。
A year 1 (divide) into altogether 24 solar terms by the Chinese lunar calendar. Start of Spring, the first solar term of the year, begins in early February. 2 lifts the curtain of spring, after which everything turns green and becomes 3 (energy).
Spring is the best season for kite-flying. With 4 available history of more than 2,000 years, the traditional folk activity can help build up one’s 5 (strong) and prevent disease. A breath of fresh air outside can release the dirty smell 6 (collect) in winter.
In China, an old legend goes 7 the egg can be set upright on the first day of the Start of Spring. But according to astronomers and physicists, 8 (set) the egg upright has nothing to do with time, but with mechanics. The most important thing is to shift the egg’s center of gravity to the 9 (low) part of the egg. In this way, the trick is holding the egg until the yolk (蛋黄) sinks as much as possible. For this, people should choose an egg about 4 or 5 days old, 10 yolk is likely to sink down.