Question: #7: As phrased, answer A would be logically correct -- plural subject/ plural verb. For answer B to be correct, the verb would need to read "seems," which as a singular verb would then agree with the singular subject "none." "Options," as the object of the prepositional phrase, of course would play no role in determining the verb tense. #17: The construction "couldn't been able" is of course grammatically and syntactically incorrect. Some correctly phrased options would be: "She couldn't have finished the race if she hadn't trained." Or "She wouldn't have been able to finish the race if she hadn't trained." #34: Answer B implies a more casual yet polite inquiry. Answer C implies one is seeking permission to call later. #60: Answer A implies a possibility. Answer A implies somewhat of an intention as well. #63: Answer A. I've never heard answer B used in this context.