她用网盖住水果以防鸟类啄食。

She covered the fruit with a net to ___keep the birds ___off.

请不要碰未干的油漆。

Please ___keep your hands ___off the wet paint.

涂抹这种面霜以防晒伤脸部。

Apply this cream to ___keep the sun ___off your face.