Grammar-in-Context

 Complete the paragraph by choosing (easier) the correct words.

How old (1)__________ you be on Friday 13, 2029? That is how old you will be when a
large asteroid, called Apophis, comes very, very close to (2) ___________planet. Asteroids
are rocks that circle the sun in space and sometimes (3)_____ close to Earth and
even hit it. Most asteroids are very small and, if you are lucky, you can sometimes
see (4)_____ in the night sky as ‘falling stars’.
However, most scientists (5)_____ one large asteroid, about six to twelve kilometers
across, hit the earth and killed all the dinosaurs about 65 million years ago. Apophis
is also big. Scientists (6)_____ it (7)_____ 2004 and they say that it is about 300
meters across. That’s about the size of a large sports stadium. An asteroid this size,
according to scientists, is (8)_____ large enough to destroy our world, but it is large
enough to destroy several cities. It will probably miss the earth, they say, but not by
very much – it will miss (9)_____ by about only 35,000 kilometers – that’s much
closer than our moon which is about 240,000 kilometers away. Another way of
thinking about it is that it will (10)_____ us by only a few minutes.
If you (11)_____ find that scary, then consider this: the same asteroid will visit earth
just a few years later, in 2036, again on Friday 13. Again, it will miss our planet, but
again by only a very small distance ... probably. The only sure thing is that all the
eyes and telescopes in every country in the world will be watching the skies
(12)_____ those two days.