Select the correct Active/Passive form of the given sentence.

Miller said to him, “Where have you been the whole month?”

Miller asked him where he had been the whole month.

The correct active/passive form of the given sentence is Miller asked him where he had been the whole month.

The sentence is in the simple past tense, which is used to describe an action that happened in the past. The active voice of the sentence is formed by putting the subject of the sentence before the verb and removing the word "to." In this case, the subject of the sentence is "Miller" and the verb is "ask." So, the active form of the sentence is "Miller asked him where he had been the whole month."

The other options are incorrect because:

• Miller asked him where had he been the whole month." The verb "had" is in the past perfect tense, but the sentence is in the simple past tense.
• Miller asked him where he has been the whole month." The verb "has" is in the present tense, but the sentence is about an action that happened in the past.
• Miller asked him where you had been the whole month." The pronoun "you" is incorrect. The pronoun "he" should be used instead.