Circle the correct preposition in these sentences.
1. They are in / on vacation now.
2. Why is she speaking on / in such a serious tone?
3. Keep aside, please, and don’t get in / on my way.
4. We bought the house on / at a reasonable price.
5. He was looking in / into my eyes trying to convince me of / about his honesty.
6. Why does she insist so much on / at buying the book if she is not interested about / in reading it?