Fill in the gaps past perfect or the past perfect continuous: 1.Leonard was exhausted because he ......... (work) in his lab all night. 2.Patty .......... (already/leave) the party when Jim arrived. 3.She wanted to come with us but she ........(not/finish) her project. 4.They .......... (live) in Londonfor ten years befor they moved to Paris

1. had been working
2. had already left
3. had not finished
4. had been living