have no idea--(what/where/how/...)--to--

1. We had no idea what to expect, where to sleep, where to camp, or work etc.

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2. When I met the President, I had no idea whether to shake his hand, bow, or what.

3. At first I had no idea how to cook anything. But, out of necessity, I learned.

4. I had no idea where to go for my first class, but luckily another student showed me where.