Past Perfect или Past Perfect Continuous 

01.    After he [had finished/had been finishing] his drink he got up. 

02.    He had an accident as he [had been driving/had driven] too fast.

03.    The show started when everyone [had sat/had been sitting] down.

04.    The snow disappeared because it [had been/had been being] 5°C. 

05.    After she [had switched/had been switching] on the radio she heard the news. 

06.    The ship landed in Nice after it [had been sailing/had sailed] for two days. 

07.    He started moving furniture at 9 AM. At 3 o'clock afternoon he [had been moving/had moved] furniture for 6 hours.

08.    Ben apologized that he [had made/had been making] a mistake. 

09.    I didn't want to read the book again because I [had already read/had already been reading] it.

10.    They were hungry because they [had been swimming/had swam] all day.