When I entered the room, I found a little boy _____ on his mother’s knees _____ to draw a picture.
#94504
A
seated; learning
B
sitting; to learn
C
seating; learning
D
sat; was learning
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He told her ______ there at once.
#97500
A
get
B
gets
C
should get
D
to get
This machine is very easy _______. Anybody can learn to use it in a few minutes. 
#90906
A
operating
B
to be operating
C
operated
D
to operate