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came was coming had come would come
have too many conflicting theories do not have enough funding to continue our research are not sure how the universe is put together have focused our investigations on the moon and planets
came was coming had come would come
came was coming had come would come
came was coming had come would come
is; have is; has are; have is; are
came was coming had come would come
is; have is; has are; have is; are
came was coming had come would come
studied have studied had studied have seen studied
would come was coming had come came
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