帮我解答一下英语的IQ题!
1.Whyisnineafraidofseven
2.Whatkindofshipneversinks?
3.Whatkindofdogwouldapersonbite
4.What'stheendofeverything?
5.Whatgoesupwhentheraincomedown?
6.Whathasteethbutdoesn'tbite?
7.Whatiswhitewhenitisdirty?
8.Whatneverasksquestions,butgetsalotofanswers?
9.Whatnailshouldyouneverhitwithahammer?