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) When the boss came back, I _________there for 6 months. (work)

had been working
had been worked
have been working

2) It was obvious from her outrageous behavior that she ___________. (drink)

has been drinking
had been drinking
had been drunking

3) Chef Jones ______ the restaurant's fantastic dinners for two years before he moved to Paris. (cook)

has been cooking
had been cookeing
had been cooking