Fill the gaps with the verb in brackets using the Past Perfect Continuous!
Example: Sam gained weight because he _______. (overeat)
Answer: Sam gained weight because he had been overeating.
1) The forensic evidence shows that he _____________ his nose just before he was murdered. (pick)
2) Scarlett came into the room panting. She __________ round the park. (jog)
3) James ______ at the university for more than a year before he left for Asia. (teach)