这个文件可以用来存放不同类型的文件。

This ___file can be used to store different types of documents.

我用锉刀修整了木椅的尖锐边角。

I used a ___file to trim the sharp edges of the wooden chair.

他昨天提交了纳税申报表。

He ___filed his tax return yesterday.

孩子们排成一队安静地走进教室。

The children ___filed quietly into the classroom in a line.