Wearing sports clothes,many Chinese people will go outdoors happily with their families or friends on March 12.They are just planting trees on this special day - China's Arbor Day （中国植树节）.
When it comes to China's Arbor Day,we can't help thinking of Mr.Ling Daoyang.He was born in 1888.When he worked as an English teacher in Beijing,he got a chance to study forestry（林业）at Yale University.After graduating in 1914，he returned to China and became a famous expert（专家）in forestry science.In 1915，he advised that the Qingming Festival should also be China's Arbor Day.His suggestion was welcomed by most people.In 1929，National Arbor Day was moved to March 12，the day Mr.Sun Yat-sen passed away,who did much to support forestry.
In 1979，March 12 was officially announced（正式宣布）as China's Arbor Day.Since then,thousands of trees have been planted all over China,making our country much more beautiful.
China's Arbor Day is educational for all of us.It reminds us that we should protect our earth and thank our old generations,who planted green,hope and joy for us.



According to the text,people often go outdoors on March 12 to ______ .

A. do sports
B. study English
C. find jobs
D. plant trees

What was Ling Daoyang in Beijing then？ ______

A. A farmer.
B. A student.
C. A teacher.
D. A worker.

What is the main idea of the last paragraph？ ______

A. The studies of China's Arbor Day.
B. The activities of China's Arbor Day.
C. The demands of China's Arbor Day.
D. The meanings of China's Arbor Day.