用方框中所给单词的适当形式填空，使短文完整、正确。

reach   take   late   know   already   get   send   discover   some   far

According to thenews, scientists have sent a spaceship to Mars. As we all know, this planet is far away from our earth. It'sthan the moon. So it hasseveral months to get there. There aren't any astronauts in the spaceship, although they havebeen to the moon. At the moment, scientists are working hard in orderthem to Mars in the future. They want toif there is life on it, but they haven't found. So far, no man hasMars yet, but people havesomething about it already. Though scientists haven't found life on it, they still believe that there have been signs of life on Mars. We're looking forward tomore information about it.