题目类型：
单选题
题目内容
If you happen to ________ my lost papers while you’re looking for your book， please let me know at once by telephone.
正确答案
A
题目解析
come across偶遇；无意中发现；句意：如果你在找书时偶然发现我丢失的文件，请立即打电话告诉我。