A-A+
The number of explanations have been offered f
问题详情
The number of explanations have been offered for its origin, but nobody knows the true story for certain.此题为多项选择题。请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：The(number)一A
从下文可知此处指找到了很多解释，但没人知道真正的原因。强调数量多应该用anumberof.
