一张英语怎么说

一张英语怎么说：How to say "一张" in English?

1. 我需要一张火车票。I need a train ticket.

2. 请给我一张纸。Please give me a piece of paper.

3. 他买了一张演唱会门票。He bought a concert ticket.

4. 这是一张照片，拍摄于去年的夏天。This is a photo taken last summer.

5. 我们需要一张地图来找到正确的路线。We need a map to find the right route.