Please choose the correct ending to complete the given sentence: Travel: [header] How to make an elevator an express elevator [title] Press and hold your floor. [step] In some elevators, simply pressing your floor and holding it will do the trick. You have to hold the button all the way to your floor.

Ending1: [title] Use the " close door " button. [step] When you get on the elevator, press the " close door " button. Ending2: [substeps] If you have more than one floor, press your floor button if you need to hold down the button while the elevator is moving. [title] Hold the elevator button both the way and vertically. Ending3: If you only hold it up for a minute, your elevator will seem like it's going to spin around, which is pointless. There's a reason for it; the elevator must have several locking mechanisms. Ending4: In other elevators, hold the button for two to three seconds, while letting go. [substeps] You won't be able to hold the button for more than 45 seconds, so be prepared to let go of the button when the elevator doors open.

Answer format: ending1/ending2/ending3/ending4