问题
选择题
The clock works well. There is only ______ of a second per year.[ ]
A. a fault
B. a mistake
C. an error
D.a crime
答案
答案：C
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The clock works well. There is only ______ of a second per year.[ ]
A. a fault
B. a mistake
C. an error
D.a crime
答案：C