题目内容
(请给出正确答案)
[主观题]
Which of the following was NOT mentioned as to what people around the world did to celebra
te Earth Day on April 22, 1990?
A.Travelers cleared up rubbish on mountains.
B.Children planted trees.
C.Government officials made speeches in public to encourage people to do something for the earth.
D.Artists and musicians gave shows to support the environmental group's work.
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