20．阅读短文，并选择方框中的词或短语用适当形式填空，每个词或短语最多选用一次，有一项是多余的．
| such as，and，no，in the end，pay，when，from，add，five，they，secret |
Our grandparents seem to have magic powers sometimes．Give them a Chinese lunar calendar（53）and they will know what the weather will be like days or even months later．
What's the （54）secret？They are following the 24Solar Terms（节气），which are an important part of Chinese culture．Last year the United Nations（55）addedit to the list of Intangible Cultural Heritage of Humanity （人类非物质文化遗产）．
The 24Solar Terms began during the ancient periods．At that time，most Chinese people made（56）theirliving on farms．So weather changes were important for them．But of course，they had （57）noweather report or Internet to help them．
But people found a way．They studied the sun's movement and also（58）paidattention to other natural changes （59）such as air temperature，water and plant growth．（60）In the end，they worked out the 24Solar Terms to mark the changes．
The terms became their guide to farming work．For example，the solar term jingzhe （惊蛰） is when insects wake up （61）froma long sleep in the cold winter．Farmers take it as a sign of warm weather and get busy working．
The 24Solar Terms is regarded as China's （62）fifth great invention，after papermaking，printing，the compass and gunpowder．Now，it is still widely used in daily life even in the age of technology-based modern farming．
