61. She came into the room _____ the door.
A. without knocking to
B. without to knock
C. without to knock at
D. without knocking at
62. I am proud of _____ in New China.
A. to be a student
B. be a student
C. being a student
D. am a student
63. Seeing is _____ .
A. believe
B. to believe
C. believing
D. believed
64. No one saw the soldier _____ .
A. to arrive
B. had arrived
C. arrive
D. has arrived
65. I saw him _____ to me.
A. to wave
B. being waved
C. waving
D. waved
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