描述帮助者工作内容的句型 — 英语填空题
题目
选词填空（每个词限用一次）：doctor, teacher, firefighter, farmer
1. A ___ helps sick people. He works in a hospital.
2. A ___ puts out fires. He is very brave.
3. A ___ teaches students at school.
4. A ___ grows rice and vegetables on the farm.