Once ______ from space, the Great Wall is till great in sight.
#96536
A
seeing
B
to see
C
seen
D
saw
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  It was dark and cold. They had to find a house ____ and some wood ____. 
#98592
A
to stay in…to make a fire with
B
to stay…to make a fire with
C
to stay in…to make a fire
D
to stay…to make a fire
____________ at college for 3 years, she knows the place very well.
#96972
A
To have studied
B
Having studied
C
Studying
D
Studied