earth
                    - He said _________________________________________.
 - _____ our earth, otherwise it will be no longer fit for us to live on.
 - our earth, or else it will be no longer fit for us to live on.
 - The earth is
 - The spaceman returned to Earth and safely landed in that area _____ the night of April 29. [ ]
 - ______ earth we live on is bigger than ______ moon.
 - This is _____ third year that China has taken part in the activity Earth Hour. But we hope we can try our best to make the earth ____better world.
 - Every Earth Day , We are made _____ signs to warn people to protect the nature .
 - Every Earth Day , We are made _____ signs to warn people to protect the nature .
 - On the 40th Earth Day, Dr Wang gave us a talk on the importance of ______ the earth.
 
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