Ⅰ. 根据句意及首字母提示完成单词（5分）
1. It is well-known that smoking is a d_______ to health.
2. Her parents have a strong i_______ on her.
3. Some doctors went to the country as v_______.
4. The village was 2, 000 meters above the sea l_______.
5. Most of the students live in school d_______.
