Q.my holly bush is losing its leaves
My holly bush is losing its leaves,leaving the stems bare except for the tips. They still have the leaves.

Are there spots on the leaves? If so, your bush could have Holly Leaf Spot Or Holly Tar Spot - this would cause leaves to drop. More information can be found here:
https://www.gardeningknowhow.com/ornamental/shrubs/holly/holly-problems-holly-leaf-spot-or-holly-tar-spot.htm
Are there any signs of insects? Some insects, such as scale, will cause leaf defoliation. For more information on scale, please visit the following link:
https://www.gardeningknowhow.com/plant-problems/pests/insects/control-plant-scale.htm
Lastly, I would review the following article which provides more information on holly bush pests and diseases to see if anything is a match for what is happening to your bush:
https://www.gardeningknowhow.com/ornamental/shrubs/holly/diseases-of-holly-bushes-pests-and-diseases-damaging-holly-bushes.htm