应该填finding。
这里涉及到一个知识点:have problem doing sth. 做某事有问题
讲解:"have problem doing sth."与"have difficulty doing sth."都可表示某事存在一定的问题和困难。
I have some problems finishing this work. 我完成这项工作有些问题。
Did your team have any problems winning the match? 你们队赢这场比赛有什么问题吗?
I don't have any problems passing this exam. 通过这次考试我没有问题。
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