131. As sweeteners, there is very small difference

between honey and sucrose, although the former

does contain minimal quantities of vitamins, minerals,

and amino acids.

B错了，small不可以修饰difference还是其他的问题呢？

我觉得是缺了一个冠词，可是there is very a small difference又不对，应该是a very small difference吧？

怎么解释这个答案呢？

thx~~~