题目

Did you have trouble ＿＿＿＿＿＿＿ the post office? A. to have found     B. with finding    C. to find           D. in finding 答案：D 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”。

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