一张纸的英语是：A piece of paper。
例句：
1、他在一张纸上我的名字旁打了钩。
He ticked off my name on a piece of paper.
2、他把他的名字写在一张纸上交给我。
He wrote his name down on a piece of paper for me.
3、只要塞进一张纸就行。
Just slip in a piece of paper.
4、有一张纸叠在卡片中。
A piece of paper was folded in the card.
5、她看到里面有一张纸，但没有把它打开。
She saw a piece of paper inside, but didn't break it open.
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