Intellectual doubts

I've some doubts.. Can u please clarify me..
1. When dog food is new and improved tasting, who tests it? (to be given a thought)
2. If the "black box" flight recorder is never damaged during a plane crash, why isn't the whole airplane made out of that stuff? (very good thinking)
3. Who copyrighted the copyright symbol? (who knows)
4. Can you cry under water? (let me try)
5. Why do people say, "you've been working like a dog" when dogs just sitaround all day? (I think they meant something else)
6. Do fish ever get thirsty? (let me ask and tell)
7. Can you get cornered in a round room? (by ones eyes)
8. Why do birds not fall out of trees when they sleep? (tonight I will stay and watch)
9. If corn oil is made from corn, and vegetable oilis made from vegetables,then what is baby oil made from? (No comments)
10. What should one call a male ladybird? (Nocomments)
11. If a person suffered from amnesia and then was cured would they rememberthat they forgot? (can somebody help )
12. Can you blow a balloon up under water? (yes u can)
13. Why is it called a "building" when it is already built? (strange isn't it)
14. If you were traveling at the speed of sound and you turned on your radio would you be ! Able to hear it? (got to think scientifically)
15. If you're traveling at the speed of light and you turn your headlights on, what happens?
16. Why is it called a TV set when theres only one? (very nice)
17. Why do most cars have speedometers that go up to at least 130 when you legally can't go that fast on any road?
18. If drink & drive is not allowed why the hell they have parking in Bars?