Final answer:
The correct word to fill in the blank is 'planned,' meaning that all trip preparations were made beforehand. 'All ready' and 'already' are terms to distinguish being fully prepared from something having occurred before now, respectively.
Step-by-step explanation:
The fill-in-the-blank question you provided can be completed using the word 'planned'. The sentence would read: 'You planned everything for the trip in advance.' This means that all the necessary preparations for the trip were made ahead of time. It is important to distinguish between 'all ready' and 'already' when completing such sentences.
'All ready' means completely prepared, whereas 'already' signifies that something has happened by or before the current time. For example, 'We were all ready for the trip, but the train had already left.' In this sentence, being 'all ready' refers to being fully prepared, while 'already' indicates that the train departed before the present moment.