Did you have trouble ＿＿＿＿＿＿＿ the post office? A. to have foundB. with finding C. to findD.

问题补充：

Did you have trouble ＿＿＿＿＿＿＿ the post office?

A. to have found

B. with finding

C. to find

D. in finding

答案：

A. to have found

B. with finding

C. to find

(答案→)D. in finding

解析：have trouble/difficulty in doing sth./with sth.是一个习惯用法，表示“做某事吃力、费劲”。