—Did you have any trouble with the customs officer?　　　　— to speak of.A. NoB. NothingC. Non

问题补充：

—Did you have any trouble with the customs officer?

— to speak of.

A. No

B. Nothing

C. None

D. Neither

答案：

A. No

B. Nothing

(答案→)C. None

D. Neither

解析：none＝no＋前述名词，此处用none代指no trouble，to speak of为固定短语，表示“值得一提的”，用于否定句。