她戴了顶帽子来遮挡阳光，避免晒到脸。

She wore a hat to ___keep the sun ___off her face.

请你别用手碰那些饼干，好吗？

Could you ___keep your hands ___off the biscuits, please?

屏幕保护膜有助于防止灰尘落到你的手机上。

A screen protector helps ___keep dust ___off your phone.