______ these pictures, I couldn’t help thinking of those days when I was in Beijing and ______ from the top of a thirty-stored building, Beijing looks more beautiful.
A. Seeing; seen
B. Seen; seeing
C. Seeing; seeing
D. Seen; seen
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The missing boys were last seen ______ near the river.
A. playing
B. play
C. to play
D. to playing
______ is believing.
A. Seeing
B. To see
C. See
D. Seen
Jean did not have time to go to the concert last night because she was busy _______ for her examination.
A. being prepared
B. preparing
C. prepare
D. to prepare
I would appreciate ______ it a secret.
A. keep
B. to keep
C. your keeping
D. that you keep
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