A. Have you ever been to forest?

Yes, I have been to forest.​(Punctuation)

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B. Sure.✔

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What do you want of shirt?

=> Corrected : The sentence is corrected grammatically. 

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Which shirt do you want? 

I want to see blue shirt.

=> Another way: Your sentence is okay and this is another way of saying it.​

I want the blue one.​