选句子补全下列对话。1x9w,@4Z7b:E;y2w*_.])h
-Who' s on duty today？1x9w,@4Z7b:E;y2w*_.])h
-9J3D1~*M7u.b*z1f1?/k4S-l)^(Q+?2Q． （Yes， I am; I am）1x9w,@4Z7b:E;y2w*_.])h