The key to exercise solutions in chapter Unit 116 - As for the textbook English Grammar in Use with authors Raymond Murphy from Cambridge University Press
Question
(Section A) Use as to join sentences from the boxes.
Answer
We all waved goodbye to Liz as she drove away.
I listened as she told me her story.
I burnt myself as I was taking a hot dish out of the oven.
The crowd cheered as the two teams came onto the field.
A dog ran out in front of the car as we were driving along the road.