The sentence that contains an inappropriate change in the voice is the one that starts with the verb in one tense and ends with the verb in another tense.
In a sentence, the verbs must be in the same tense. This promotes textual agreement and coherence. If a sentence shows a verb in one tense and then another verb in another tense, that sentence showed an inappropriate change in voice.
Example: He is a great friend, but he had a habit of gossiping about the family.
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