Rewrite the sentences using "wh-word + to-infinitive

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Exercise 2: Rewrite the sentences using "wh-word + to-infinitive".
1. I'm not sure what I should buy for her in the birthday party.
2. They wondered how they could deal with this problem.
3. "Should I talk to him first," he wondered.
4. "Where should we park our bikes?" asked Peter and Mary.
5. "Dad, when should I leave for the bus tomorrow?", he asked his father.
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6. I don't know where I should turn for help.
7. I will show you how you can do it.
.. ....