根据所给句子选出相应的职业。(15分)
( )(1)I work in a hospital. I help people. I am a ________.
( )(2)I work on the farm. I get many good things in autumn. I am a ________.
( )(3)I drive a bus every day. I can travel. I am a ________.
( )(4)I work at school. I love my students. I am a ________.
( )(5)I am very busy. I catch the thieves(小偷).I am a________.