问题
单项选择题
By regulation，you MUST keep a record of the use of your radiotelephone for a minimum of（）.
A.six months
B.one year
C.two years
D.thirty months
答案
参考答案：C
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By regulation，you MUST keep a record of the use of your radiotelephone for a minimum of（）.
A.six months
B.one year
C.two years
D.thirty months
参考答案：C