4 But it is at distances of millions，even billions，of light years that the VLT really shows its power.The VLT can detect light that set out on its journey before the earth even existed.This gives astronomers their firstever detailed views of events that took place in the earliest days of the cosmos.

　　5 In other words.the VLT is a kind of a time machine.It takes astronomers back to a time when complete galaxies crashed into each other.The effects of these past collisions Can now be seen by scientists，and astronomers believe the telescope will reveal more about these exciting events in the years to come.One day, we might be able to say we have traveled back to the beginning of time，and we will have a much clearer picture of how our planet was born.

23 Paragraph 1________.

24 Paragraph 2________.

25 Paragraph 3________.

26 Paragraph 4________　

A Enents That Took place Before the Earth Existd

B Power of the Telescope

C Details of Eta Carinae

D Invention of a Time Machine　

E Biggest Telescope

　27 The VLT will allow scientists to see events________.

28 The designers of the VlT are surprised at________.

29 Eta Carinae is taken________.

　30 Scientists believe the VLT will tell us more about________.

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