paper意为文件、证件、试卷时是可数的。复数形式是papers.
例句：
I keep my private papers hidden.
我藏起了我的私人文件。
I cleared my desk of papers.
我清理好了写字台上的文件。
扩展资料
I spent all weekend grading papers.
我整个周末都在评阅试卷。
The floor was littered with papers.
地板上乱七八糟扔了许多报纸。
His desk was piled high with papers.
他的桌子上摞着高高的一堆文件。
She looked at the papers around her.
她看了看她四周的报纸。
The teacher gave out the exam papers.
老师分发了试卷。
