Help the clumsy time traveler complete his diary entry by dragging the correct future-in-the-past expressions into the gaps.

I was about to press the temporal reset button when the laboratory's alarms suddenly started blaring. Little did I know that this minor five-second delay would alter the entire course of the 23rd century. Originally, my expedition was to remain a complete secret, but now I've practically announced my arrival to the universe!

I was about to press the temporal reset button when the laboratory's alarms suddenly started blaring.

We use "was/were about to" to describe an immediate future action in the past, which is very often interrupted by another event.

Little did I know that this minor five-second delay would alter the entire course of the 23rd century.

"Would" is used here to talk about a destined event or a future outcome viewed from a point in the past (often used in storytelling to hint at what happened later).

Originally, my expedition was to remain a complete secret, but now I've practically announced my arrival to the universe!

"Was/were to" + infinitive is used to talk about formal plans, arrangements, or destined events that were scheduled in the past.