根据首字母及句意完成单词。

1. We ought to be r_____ to help old people in need any time.

2. I'd like to t_____ around the world in the future.

3. Many of my classmates have poor e_____ because of too much TV and

computer work.

4. Our English teacher has a good s_____ of humour and he always makes us I

_____.

5. The Great Wall is quite f_____ in the world.