问题描述：
At night,we can see lots of stars (1)____ the sky.根据上下文填空
We see them every night, and we think they are always there.But this may not be true.We can the stars now (2)____ some of them aren't there now!
The light from a star comes (3)____ us very fast, but it comes a long way. Alpha Centuri is a star near to Earth. Light (4)____ star takes four years to reach us. We see the star how it was a long time ago, not (5)____ it is now.
We see them every night, and we think they are always there.But this may not be true.We can the stars now (2)____ some of them aren't there now!
The light from a star comes (3)____ us very fast, but it comes a long way. Alpha Centuri is a star near to Earth. Light (4)____ star takes four years to reach us. We see the star how it was a long time ago, not (5)____ it is now.
问题解答：
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