Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to pump a spalding neverflat basketball [title] Warm up the ball. [step] The neverflat ball won't lose as much air as a normal basketball, but it can still deflate a little in cold weather. If you stored it outside or in a cold garage and it feels flat, dribble it until it warms up.

Ending1: Keep an eye on it, knowing when to breathe. Set the starting point and stop the ball before resuming your stance. Ending2: Leave it at the same length for about 30 seconds, then process it or clip it into strips. Then combine the wet and dry mixture with cool water to make it easier to prepare your ball. Ending3: If you scored a goal, you can try to get excited and go for a run. Choose a place where the ball will be easy to make contact, and at least 70% to 100% airflow is ideal. Ending4: [title] Take advantage of the warranty for balls under a year old. [step] Spalding basketballs are covered by a limited warranty for one year after purchase.

Answer format: ending1/ending2/ending3/ending4