阅读理解。
Have you ever heard of the story of Earth Day? Now let me tell you.
Earth Day was started 111 1970 by a man named John McConnell from the United States. In the
beginning,  it was held on one day in spring when the day and night are of the same length around the
world.Now it is celebrated on April 22nd.  Earth Day is now celebrated all over the world.
Earth Day is a very special, day.'It makes all of us think about problems we make for the earth. It
is not only a special day in the city where we live, but a day that the whole world celebrai.e.
Some countries-have Earth Day celebrations, and some people and groups join in Earth Day projects(计划) such as "Protect Our Home" and "Water for life".
You can join in one of the projects, or start one of your own. It can be something small like planting
a tree with your mom,  or something large like cleaning up a park with your classmates or frierjds.  You
can do almost anything. Try to think of something you would like to do.
Why do we celebrate Earth Day? Because we have only one earth and it is our only home. It is
getting very dirty.  It is our ducy to protect our beautiful home. Earth Day is a day to call on people
around the world to save our earth.
1.  An_______called John McConnell started Earth Day in 1970 and now it is celebrated all over the
world on the_______of April.
2.  On Earth Day people don't_______celebrate this special day but also think more about what's to the
earth.
3. Some countries have different Earth Day _______by_______in Earth Day projects.
4. It doesn't matter whether your project is_______.
5. We celebrate Earth Day to _______people around the world to_______our earth.

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