When I entered the room, I found Mary __
题型:选择题
问题:
When I entered the room, I found Mary ______ at the desk ______ her homework.
A.sat; doing
B.sitting; to do
C.seating; to do
D.seated; doing
When I entered the room, I found Mary ______ at the desk ______ her homework.
A.sat; doing
B.sitting; to do
C.seating; to do
D.seated; doing