Select the most appropriate option to fill in the blank.

They postponed ______ on vacation due to adverse weather conditions.

going

The most appropriate option to fill in the blank is going.

The sentence is about the people postponing their vacation due to adverse weather conditions. The word "going" is the present participle of the verb "to go." It is the most appropriate word to use in this context because it conveys the meaning of the people planning to go on vacation but then changing their plans.

The other options are incorrect.

• To be gone is the infinitive form of the verb "to go." It is not appropriate to use the infinitive form in this context.
• For going is a prepositional phrase. It is not appropriate to use a prepositional phrase in this context.
• To go is the bare infinitive form of the verb "to go." It is not appropriate to use the bare infinitive form in this context.