Answer:
D). Will be quaking.
Explanation:
As per the question, the verb phrase that is in the correct tense would be 'Will be quaking' as the sentence is alluding to future tense which implies that the action is yet to happen. As we know that future continuous tense is employed when there is an indication about an action to be occurred in the future and carried for an expected time. Thus, only this tense would be able to comprehend the meaning of the sentence and after filling the gap, the sentence reads as:
"Tomorrow night when we take the ghost tour of the city, I will be quaking in my boots, hoping we don’t actually see anything too spooky!"
Therefore, option D is the correct answer.