I’m surprised to hear from her we last met ten years ago .A. On one hand B. That is to

问题补充：

I’m surprised to hear from her , we last met ten years ago .

A. On one hand

B. That is to say

C. Believe or not

D. In other words

答案：

A. On one hand

B. That is to say

(答案→)C. Believe or not

D. In other words

解析：句意：我很惊讶地收到她的来信。不管你相信不相信，我们最后一次见面是在十年前。On one hand 一方面；That is to say也就是说；Believe or not相信不相信；In other words换句话说; 就是说;。根据句意可知该选C。