Grammar Choose the correct tense. 1 The robber had left/had been leaving before the police arrived. 2 He was angry because somebody had been taking/had taken his keys. 3 How long had you been waiting/had you waited before the ambulance arrived? 4 By the time we got there, the firefighters had put out/had been putting out the fire. 5 They were tired because they worked/had been working all night.
1 The robber had left before the police arrived.
2 He was angry because somebody had taken his keys.
3 How long had you been waiting before the ambulance arrived?
4 By the time we got there, the firefighters had put out the fire.
5 They were tired because they had
been working all night.