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First English Grammar 92
Real English Grammar 92
Grammar with Laughter 92
Instant Grammar Lessons 92
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Grammar Explorer 93
Grammar in Context, Sixth Edition 94
The Heinle Picture Dictionary, Second Edition 95
91
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Language
The moon is Earth's only natural satellite and the only extra-terrestrial body
humans have visited. With gravity six times less strong of that on Earth, astronauts
can take giant leaps on its surface as if weightless. Unlike Earth, the moon doesn't
have an atmosphere, however, water has been found at both poles - deposited
from comets impacting onto its surface.
FACT