Sentences with idioms

[Twin]

Could you check if the following sentences are correct?

What is the best way to pop the question?

Is Russia suffering from too much red tape? What should the government do to cut it?

What would you describe as the biggest feather in your cap?

What is the easiest way to make you lose your rag?

In what situation you would not go by the book?

Is Moskau your cup of tea? Why?

How would your life be different if you were in Queer Street?

When was the last time you were dressed up to the nines?

What would you do if someone you trust turned out to be a fair-weather friend?

How far do you agree with the statement that everyone deserves to be given a break?

When was the last time you were completely floored?

Do you think that women throw in the towel more easily than men?

Have you ever bought something that cost an arm and a leg because you couldn’t resist the
temptation?

Is it easy to get a rise out of you? Why?

If you had a company, what measures would you take to prevent it from going belly-up?

When was the last time you wetted your whistle?

[Beeesneees]

This isn't:
In what situation you would not go by the book?

In what situation would you not go by the book?

The rest are all grammatically correct and would certainly test knowledge of the idioms.
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Cheers m' dears!

[Twin]

You've really helped me. Thank you so much.