I was trying to get into the _____ bus when I heard a voice from behind.
A. crowd
B. crowding
C. crowds
D. crowded
A. crowd
B. crowding
C. crowds
D. crowded
【答案】
A. crowd
B. crowding
C. crowds
D. crowded
A. crowd
B. crowding
C. crowds
D. crowded
【答案】
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