The Double Ninth Festival     1     (celebrate) on the ninth day of the ninth lunar month. It is also known     2     the Senior Citizens’ Festival. The festival     3     (base) on the theory of Yin and Yang, the two opposing principles in nature. The ancients believed that all natural     4     (phenomenon) could be explained by this theory. Numbers are related to this theory. Even numbers belong to Yin and odd numbers to Yang. The ninth day of the ninth lunar month is a day     5     the two Yang numbers meet. So it is called Chongyang.

    6     (appreciate) chrysanthemum (菊花) and drinking chrysanthemum wine have always been a tradition during the Double Ninth Festival. Chrysanthemums are regarded as a kind of flower     7    (have) the function of an antitoxin (抗毒素) and can drive the evil away.

As nine is pronounced “jiu” meaning long in Chinese, so people use the word jiu     8    (express)the meaning of longevity with a person’s life. In the year of 1989, the Double Ninth Festival was designated as Senior’s Day — a day to respect the elderly. Members of a family also     9     (company) their elders to have a     10     (relax) day in a natural setting while wishing health and happiness upon them.

Earth Day,     1    (mark) on 22 April, is an annual event aiming to raise public awareness about environmental protection. First celebrated     2     1970, the Day now includes events in more than 190 countries and regions(地区). No matter what you like to do, there is a way to get involved in various     3    (activity) on Earth Day. You can plant a tree, make a meal with locally grown vegetables, or save power—the possibilities are endless.