Explanation:

The correct answer is option D: "would be / have heard."

In this sentence, we are discussing our perception of Maria as an interesting person to meet based on the stories we have heard about her. Let's analyze each option to understand why option D is the correct choice:

a) is / had heard: The verb tense in this option is not appropriate. "Had heard" suggests that the action of hearing the stories about Maria occurred before the present moment. However, the sentence is discussing our current perception of Maria, so the verb tense should be in the present. Additionally, "is" should be replaced with "would be" to express a hypothetical situation.

b) can be / heard: This option does not accurately convey the meaning of the sentence. "Can be" suggests that Maria has the ability to be an interesting person, which is not the intended meaning. The sentence is discussing our perception of Maria based on the stories we have heard.

c) might have been / hear: This option uses incorrect verb tenses. "Might have been" suggests a possibility in the past, but the sentence is discussing our perception of Maria in the present. Additionally, "hear" should be replaced with "have heard" to indicate that we have already heard the stories about Maria.

d) would be / have heard: This is the correct answer. "Would be" is used to express a hypothetical situation, which is appropriate for discussing our perception of Maria. "Have heard" accurately conveys that we have already heard the stories about Maria.

e) will be / will have heard: This option suggests future events, which do not align with the meaning of the sentence. The sentence discusses our current perception of Maria based on the stories we have heard, not our future perception.

In conclusion, option D: "would be / have heard" is the correct answer as it accurately conveys the intended meaning of the sentence in the appropriate verb tense.