B1
being or appearing to be a particular thing
Dictionary examples:
As a novice gardener, he watered plastic plants for a month before realizing his mistake. (0.0)
Dressed as a tree for the school play, he accidentally got watered during the performance. (0.0)
As a new gym member, he mistook the treadmill for a conveyor belt and tried to order food. (0.0)
He was dressed as a pirate. (20.7)
As a young man, he was very lonely. (27.3)