阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
A
The traditional Chinese lunar calendar divides the year into 24 solar terms, which reflect the Chinese people’s understanding of time. Here several special solar terms are listed.
Rain Water
Rain Water signals the increase in rainfall and rise in temperature. With its arrival, the river water defreezes, wild geese move from south to north, and trees and grass turn green again. Extra care is needed to cope with a returning cold spell in this period. The wet and damp weather during Rain Water period is considered harmful for people’s spleen (脾) and stomach according to Chinese medical practice. Therefore, a bowl of nutritious porridge is the best choice to nourish the body.
Awakening of Insects
As the third solar term in the lunar year, its name implies that animals sleeping in winter are awakened by spring thunder and that the earth begins to come back to life. It is the key time for spring agricultural activities. Modern meteorological science shows that around this period, the earth becomes wet, the hot humid air from the north is strong and creates frequent winds. For this reason, thunder often occurs.
Spring Equinox
Spring Equinox signals the equal length of the day and night time. On the day of the Spring Equinox, the sun is directly above the equator. After the equinox, the sun moves northwards, resulting in gradually longer day time in the Northern Hemisphere. Standing an egg upright is a popular game during this period. It is believed that if someone can make the egg stand, he will have good luck in the future.
Grain Rain
Grain Rain originates from the old saying, “Rain brings up the growth of hundreds of grains”, which shows that this period of rainfall is extremely important for the growth of crops and people are busy working on the land. Grain Rain falls between the end of spring and the beginning of summer, with infrequent cold air moving to the south and lingering cold air in the north. With dry soil, an unsteady atmosphere and heavy winds and sandstorms become more frequent.
21. What can we know about Rain Water?
A. River water starts to freeze
B. Taking off the thick coats is advisable
C. Lively spring-like scenery can be seen
D. It falls between the end of spring and the start of summer.
22. What do Awakening of Insects and Grain Rain have in common?
A. Farming season B. Animal activities
C. Air temperature D. Frequent thundering
23. In which solar term would people most probably put on masks?
A. Rain Water B. Grain Rain
C. Spring Equinox D. Awakening of Insects
