It was wonderful up there. Ralph wanted to reach out and【C1】______a star, for they【C2】______so close. He could see the earth getting smaller and smaller.  The ship circled around a made star called Mars(火星), and his space friends【C3】______Ralph understand that this was their home.  He wanted to ask all kinds of【C4】______, but no one could answer him. There was nothing to eat or drink. There people had only【C5】______colours pills which they can eat【C6】______they were hungry.  Soon it became【C7】______harder for Ralph to breathe than he felt at first. He felt【C8】______light that he could not even stand【C9】______his own feet. "If I could only have some water, " he【C10】______, " and a ride back down to the earth! "  The spacemen knew that it was【C11】______for Ralph to leave. He could not live up there【C12】______longer without special air or suit like theirs. So they took him to a part of the ship where there was【C13】______enough for just one man. A door closed over his head and【C14】______a minute Ralph was flying down to the earth in his own rocket ship.  Suddenly he felt the rocket【C15】______down and then stopped. He was back on the earth.

Ralph wanted to reach out and【C1】______a star,