她做饭前磨了刀。

She ___sharpened the knife before cooking.

你需要削尖铅笔才能正确书写。

You need to ___sharpen the pencil to write properly.

艺术家每天早晨削尖他的铅笔以确保线条精确。

The artist ___sharpens his pencils every morning to ensure precise lines.