Answer:
1.) I had a job last summer. → (have a job) → I _____ a job last summer.
2.) I was a cashier. → I (be a cashier) → _____ cashier.
3.) I cooked in a restaurant. → (cook) → I _____ cooking in a restaurant.
4.) I wrote my resume. → (write my CV) → I ____ my CV.
5.) I read the classified ads. → (read the classifieds) → I ____ the classifieds.
6.) I put on my uniform. → (put on my uniform) → I _____ my uniform.
Explanation: