sharpen

你需要削尖铅笔才能正确书写。

You need to ___sharpen the pencil to write properly.

为了书写整洁，你需要定期削尖铅笔。

To write neatly, you need to ___sharpen the pencil regularly.

我希望这门课程能帮助我提升我的计算机技能。

I hope this course will help me ___sharpen my computer skills.