自然界中，水能以多种不同的状态呈现，气态的水是（　　）

根据情境及首字母提示填入适当的单词，使短文句意完整、通顺。
Pen pal wanted
   His name is Wang Lei. He is a____ C_____ boy. He wants a pen pal in____ F_______ . He thinks it’s a very____ i______  country and he wants to learn some French. He____ l_____  in Beijing, China with his parents now. He is 14 ____  y______  old and his____ b______  is in November. He can speak Chinese and a little English. What are his ____  l______ ? He likes watching sports games on TV and ____  p_____ computer games with his friends. His favorite subject is computer science. It’s____  f______ . He doesn’t like math, because it’s too difficult.
   Please write to____ h____ and be his pen pal.

我们生活中有很多现象蕴含着地理知识，下列现象与地球自转有关的是