Neither of them knows the difference the two and we can’t tell one the other, either.
A. between; between
B. among; from
C. among; between
D. between; from
网友回答
A. between; between
B. among; from
C. among; between
(答案→)D. between; from
解析：原句意思是，他们两人都不知道这两者的不同，我们俩也说不出来。difference后接between 意（两者之间的）差异，tell A from B 区分A和B。故选D，最符合题意。