comets some stars seem to have tails, but if they do, they are not really stars. they are balls of rocks and gas, called, comets, that streak past the earth whi

comets
some stars seem to have tails, but if they do, they are not really stars. they are balls of rocks and gas, called, comets, that streak past the earth whit tails of stardust behind them.
sunlight glitters on the stardust making it gleam in the night sky. sweep around the come from way out in space. they rush past the eart, sweep around the sun , and then whiz far out into space again. the only time can see a comets is when it passes close to the earth.
harlley's comets is one that big and bright it passes close to the earth about 75 years - just once in a lifetime


questions

1. "the rush past the earth, sweep". what does the word they refer to?
2. what does the first paragraph talk about?
3. what does the text focus on?
4. what part of the text is the second paragraph?
5. what is the communicative purpose of the text??

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