25．
| temperature，what，weather，change，nature ，when，long，because，five，they，of |
Our grandparents seem to have magic powers sometimes.Give them a Chinese lunar calendar（日歷） and they will know（1）
the weather will be like days or even months later.
That's（2）
they are following the 24 solar terms（節(jié)氣），which are an important part（3）
Chinese culture.The 24 solar terms started in ancient times.At that time，most Chinese people made（4）
living on farms.So weather changes were important for them.But of course，they had no（5）
reports or the Internet to help them.But people found a way.They studied the sun's movement and also paid attention to other （6）
changes such as air（7）
，water and plant growth.In the end，they worked out the 24 solar terms to mark the（8）
.
The solar terms became their guide to farming.For example，the solar term jingzhe （驚蟄） is when insects wake up from a（9）
sleep in the cold winter.Farmers take it as a sign of warm weather and get busy working.
The 24 solar terms are thought to be China's（10）
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.
