{{B}}quEstions 19—22{{/B}}

A、thEy ArE wAiting For thEir turn to FilE A ClAim For unEmploymEnt.
B、thEy ArE wAiting to tAlk to thEir Boss.
C、thEy ArE wAiting to Buy somE plAnts.
D、thEy ArE wAiting to BE intErviEwED、