根据句子意思和所给的首字母写出所缺单词。 |
1. Oxygen (氧气) is a kind of u_______ gas. 2. The Yellow River is the s________ longest river in China. 3. I think it u________ to see the ghosts (鬼). You must be joking. 4. There are many a_______ who want to fly to the moon. 5. I felt surprised and scared when I saw the t________ monsters. |