ex 3
1. gоt // had eaten
2. met // had been
3. started // remembered // hadn't closed
4. found // had never opened
5. told // had already bought
ex4
1. When George had eaten the chocolate biscuits he started eating the lemon ones.
2. When I had turned off the lights in the office, locked the door and left.
3. I borrowed Karen' s newspaper when she had read it.
4. Mark had a long hot shower when he had done his exercises.
5. When Barry had phoned his mother with the good news he went to bed.