Please choose the correct ending to complete the given sentence: Health: [header] How to use crutches [title] Obtain new crutches or used ones that are in very good condition. [step] Make sure the crutches are sturdy, and that the rubber padding, where your armpit rests, is still springy. Inspect the the bolts or pins that adjust the crutch length.

Ending1: [title] Place the crutches on your feet and secure them to the hand grips, either with clips or on their pegs using the eyelet. [step] Place the crutches on a controlled foot (such as underhand or ankle slippage or other obstacles). Ending2: [title] Look for crutches that can support your extended range of motion. [step] If you are attempting to walk, you will need to always have crutches and walker styles. Ending3: Make sure the crutches have the rubber tips at the bottom. [title] Adjust the crutches to a comfortable height. Ending4: Make sure they are in good working order. [title] Stand tall with the crutches balanced on one foot and your knees bent.

Answer format: ending1/ending2/ending3/ending4