Fill in the gaps with the verb in brackets using the past perfect continuous.
Example: Sam gained weight because he _______ for 2 years. (overeat)
Answer: Sam gained weight because he had been overeating for 2 years.
1) The forensic evidence shows that he _____________ his nose just before he was murdered. (pick)
2) When they cancelled the flight to Alicante, the storm ____________ all afternoon with no sign of abating. (rage)
3) James ______ at the university for more than a year before he left for Asia. (teach)