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.