When I entered the room, I found Mary ______ at the desk ______ her homework.
#95934
A
sat; doing
B
sitting; to do
C
seating; to do
D
seated; doing
推荐题目
The old sick lady entered the hospital, ______ her two sons.
#97437
A
to support
B
supporting  
C
supported by 
D
having supported
with his business, Mr.Green seldom had a talk with his family face to face.
#96027
A
Occupying
B
Occupied
C
Being occupied
D
To be occupied
Dr Yuan makes______ possible______ one-third more of the crop in the same fields.
#94462
A
it; produce
B
it; producing
C
it; to produce
D
it; produced