1
we 2
3 Fill in the gaps with one word for each space.
Space exploration has existed
a long time. We have been to the moon and
sent robots to Mars. In the
future, they say we'
have holidays
in space and if the planet
too
crowded some people will live on new planets.
Technology
changed our lives in
so many ways. But there are many problems on
Earth we
solved.
4
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