When I entered the room, I found a littl
题型：选择题
问题：
When I entered the room, I found a little boy _____ on his mother's knees _____ to draw a picture. [ ]
A. seated; learning
B. sitting; to learn
C. seating; learning
D. sat; was learning
When I entered the room, I found a little boy _____ on his mother's knees _____ to draw a picture. [ ]
A. seated; learning
B. sitting; to learn
C. seating; learning
D. sat; was learning