Complete the starship captain's urgent log entry with the grammatically correct phrase.

"It is imperative that the hyperdrive _____ offline immediately, lest the space-llamas notice our energy signature."

The correct answer is be taken.

Adjectives expressing urgency or importance (like "imperative", "crucial", or "essential") trigger the subjunctive mood in a that-clause. In the passive voice, the subjunctive uses "be" + the past participle, regardless of the subject.