___that China has the larger number of mobile phone users.

题目

___that China has the larger number of mobile phone users.
I believe so It seems everyone has one
A Soneone said B,they told me C,it's said that DI was told
问为什么选C
可是其它选项貌似也通顺，求详解

答案

固定用法
据说,有说法等的含义就是it's said that
其他选项不对的原因很简单,你看句子中的动词是has,一般现在时,而其他三个选项都是过去时态,所以不对啊