Past perfect or past perfect continuous
1. i had been working/had worked part-time for the company
2. he had applyed/had been applying for over 100 jobs before he found the one he is doing now.
3. mr tomas was always very calm because years of teaching had been teaching/ had teached him to be very patient.
4. simon was so happy when he got the job. he had been wanting/had wanted to become a fireman since he was a little boy.
5. sally had been suffering/ had suffered from exhaustion for a long time so she just had to take some time off work.
6. for the last ten month that he was with that company, brian had been travelling/ had travelled constantly around the country. that was why he left.
7 the manager had interviewed/ had been interviewing over 70 applicants before he found somebody suitable.