send, go, become, discover, name, be, reach, imagine, have, get, run |
The universe is very big. But how large is the universe? It is impossible
But we know the earth is our home. It is a planet and it
Scientists have also found many other galaxies in the universe. But they are very far away, so no spaceship has travelled far enough
A. into B. when C. away D. without E. of F. from |
Scientists have always wanted to know more about the other worlds in space. Years ago they knew a lot about the moon. They knew how big it was and how far it was
The moon is about 384,000 kilometers
reach, be, go, find, not know, discover, think, call, have, communicate, keep |
Scientists think that there has been life on the earth for hundreds of millions of years. However, we haven’t
The earth is a planet and it
Scientists
Scientists have sent spaceships to the planet Mars to take photos. They have even sent spaceships to travel outside the solar system . However, no spaceship has travelled far enough
Go none call much billion discover reach impossible that large has |
The earth is a planet and it
Scientists have also
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