1. No comment. 2. I'm not at liberty to say. (= I don't have permission to give the information) 3. Wait and see. (= you will discover the answer later) 4. Let me get back to you. (= I will give you the answer later) 5. I'm sorry, that's confidential. 6. I'm sorry, that's personal. 7. I'd rather not talk about it. 8. It's none of your business. 9. Mind your own business. 10. Why do you want to know? #8 and #9 are rather rude – telling the other person to stop inquiring about your life
Eye protection is neccesary to protect your eyes from the ball and from the racquet. Wearing eye guards is mandatory in almost every pro tournament worldwide. Keep in mind that pros have spent their lives developing accurate shots with compact follow throughs. So if these players feel eye guards are important than you can be certain you should be wearing them too.