根据句意及首字母提示，填写单词
（1）Don't f____  the bottle (瓶子) with hot water. It's very dangerous.
（2）Can you i____  what life on the moon is like?
（3）This is a club s____ organized for football fans.
（4）Please s____  the door when you leave the office.
（5）The old man seems a little d____ . Please speak louder, or he can't hear you clearly.