Final answer:
Combine the sentences using 'who' by writing: 'Bethany, who had her arm bitten by a shark, taught Nick surfing.' Turn an active voice sentence into passive voice by rephrasing 'A tornado destroyed the neighborhood' to 'The neighborhood was destroyed by a tornado.'
Step-by-step explanation:
Combining Sentences Using "who" and Changing to Passive Voice
To combine the two sentences regarding Bethany and Nick using "who," we can write: Bethany, who had her arm bitten by a shark, taught Nick surfing. This sentence links both pieces of information, explaining who Bethany is and what she did for Nick.
When changing a sentence into passive voice, you often make the object of the action into the subject of the sentence and vice versa, and use a suitable form of the verb 'to be' followed by a past participle. For instance, the active sentence "The teacher will give you directions" in passive voice becomes "Directions will be given to you by the teacher."
Using this knowledge, we can change the second question into passive voice. The active sentence "A tornado destroyed the neighborhood" becomes "The neighborhood was destroyed by a tornado." Here, the focus shifts from the tornado to the neighborhood, which is now the subject being acted upon.