Explanation:

- Gear up for: This idiom means to prepare or get ready for something. It implies making necessary arrangements or adjustments to face a forthcoming event or task.

- Put on: This phrase often means to dress oneself in clothing or accessories. It can also mean to pretend or act.

- Pass into: Typically means to enter or move into something, like transitioning into a different state or phase.

- Start off: To begin or commence an action or journey. It suggests the initiation of something new.

- Get ready for: This means to prepare oneself for an upcoming event or challenge. It aligns closely with "gear up for."