在牙刷上放少量牙膏。

Put a small amount of ___tooth ___paste on the brush.

如果我必须刷牙，我用牙刷和一点牙膏。

If I have to brush my teeth, I use my toothbrush with a little ___tooth ___paste.

别忘了在商店买牙膏。

Don't forget to buy ___tooth ___paste at the store.