— How much of his speech do you think you have understood?—. I wish I had worked harder.A.

问题补充：

— How much of his speech do you think you have understood?

—. I wish I had worked harder.

A. Quite a few

B. Very few

C. Next to nothing

D. Quite a lot

答案：

A. Quite a few

B. Very few

(答案→)C. Next to nothing

D. Quite a lot

解析：Quite a few不少，相当多；Very few 极少数的；Next to nothing 几乎没有；Quite a lot很多，非常多。句意：他的演讲你认为你明白了多少？联系下文，我希望我学习更努力点。可知前文为否定回应，故选C。