The tone of that expert sounds serious and regretful.
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Answer:
on is the answer
Explanation:
hope it helps you 100%correct
•On is used to indicate position, usually indicating that something is on top of something else.
.•IN Use in when something is located inside of a defined space
Answer: Why'd you spend so much money on a coffee?
Explanation: The contraction using why in the sentance is why'd, a contraction using the words 'why' and 'would'