问题
选择题
A _____ of murders made the police run here and there, but no murderer was caught. [ ]
A. series
B. numbers
C. amount
D. set
答案
答案：A
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A _____ of murders made the police run here and there, but no murderer was caught. [ ]
A. series
B. numbers
C. amount
D. set
答案：A