Ответ:

1. a doctor helps people at the hospital
2. a mechanic fixes cars at the garage
3. a baker makes a cake at the baker's

я не уверен если нужны the так как их нету в данных словах ну да ладно x)

Ответ:

1. a doctor helps people at hospital

2. a mechanic fixes cars at garage

3. a baker makes cake at baker`s