Atnight,wecanseelotsofstars(1)____thesky.根据上下文填空
Weseethemeverynight,andwethinktheyarealwaysthere.Butthismaynotbetrue.Wecanthestarsnow(2)____someofthemaren'ttherenow!
Thelightfromastarcomes(3)____usveryfast,butitcomesalongway.AlphaCenturiisastarneartoEarth.Light(4)____startakesfouryearstoreachus.Weseethestarhowitwasalongtimeago,not(5)____itisnow.
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