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. 【C9】