根据句意及首字母提示写出单词。  

1. The plane will a              at this airport at 10 o'clock.  

2. My sister is good at gymnastics, but it's d              for me.

3. Lily is a careful girl. She does everything very c            .  

4. It's s             to cross the road when the traffic lights are green.  

5. There are lots of  v              to the Great Wall every year.