---How much difficulty did you have this problem? ---- . It's quite easy.

---How much difficulty did you have        this problem?   ----         . It's quite easy.
A. to solve; Nothing B. to solve; None C. solving; None D. solving; Nothing
【答案】C
【解析】
【详解】句意：——你在解决这个问题方面有多少困难？——没有一个。它是相当容易的。Nothing没什么，对what提问的回答；none没有一个，是对how many或how much提问的回答。have difficulty doing sth做某事有困难，故第一空用动名词solving。根据It’s quite easy可知表示这很容易，因此没有一个困难，故用none。故选C。