短文填空Many people do not know anything about the Earth Day.The

短文填空
Many people do not know anything about the Earth Day.They have no idea about what the Earth Day is or
1、__to make our world a safer and cleaner 2、_____.For a long time San Francisco hadmore fog,which was 3、__the enviroment,than any other cities in America.In order to solve the 4、__problems and protect people in the city,the5、——Earth day was made on April 22,1970 in San Francisco.It's hard to imagine that 6、——1972 only 36 percent of America's lakes and 7____were safe for people to fish and swim in.Today more than 60percent are fit for 8_____and fishing.Since the creation of the Earth Day.it has 9_____millions of people around the world.They have done things every day to save resourace,to protect our living environment and to 10________ a better world for our children.