Complete the extract by underlining the correct narrative tense in italics.
Oliver and Isabelle were going/had been going out ever since they were meeting/met at university two years earlier. Oliver felt/was feeling it was time to ask her to marry him so he bought/was buying an engagement ring. He had been/was determinated to make a romantic proposal so he had prepared/was preparing a delicious picnic in a surprise location. Driving his dad's Land Rover,Oliver was picking up/picked up Isabelle who had waited /was waiting impatiently outside her house.