1.Provide a specific time or occasion when you last bought a pen or pencil. 2.You can also mention the reason for buying it, such as for work, school, or a specific project.

1.提供一个具体的时间或场合，说明你上一次购买钢笔或铅笔的情况。 2.你也可以提到购买它的原因，例如用于工作、学校或某个特定项目。