A、  B、  C、  D、  D

(A)He’s opening the door.
(B)He’s sitting upright in a chair.
(C)He’s working with a tool.
(D)He’s taking off his running shoes.

(A)They’re entering the gallery.
(B)They’re hanging up some pictures.
(C)They’re sketching some art.
(D)They’re closely examining a picture.