If you give John all your money, you are likely to burn your fingers. A. be unhappy B. be happy C. suffer D. be ill

The correct answer is C. suffer.

The idiom “to burn your fingers” means to experience pain or loss as a result of a foolish or reckless action. In this case, the speaker is warning the listener that if they give John all their money, they are likely to lose it. This is because John is a untrustworthy person who is likely to take advantage of the listener’s generosity.

Option A is incorrect because the listener is not likely to be happy if they lose all their money. Option B is incorrect because the listener is not likely to be happy if they lose all their money. Option D is incorrect because the listener is not likely to be ill if they lose all their money.