问题补充:
---How much difficulty did you have this problem?
---. Its quite easy.
A. to solve, Nothing
B. solving; None
C. to solve, None
D. solving; Nothing
答案:
A. to solve, Nothing
(答案→)B. solving; None
C. to solve, None
D. solving; Nothing
解析:句意:---解决这个问题你有多少困难。---一点也没有,它相当容易。Have difficulty doing sth.故当回答how much多少的时候应该用none,当回答what的时候应该用nothing;选B。