问题
选择题
Five _ eight is thirteen. You made a mistake while numbering. [ ]
A. add to
B. added to
C. add up
D. added up
答案
答案：B
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Five _ eight is thirteen. You made a mistake while numbering. [ ]
A. add to
B. added to
C. add up
D. added up
答案：B
相等，那么a的值是（）