What has teeth but cannot eat?(竞赛智力题）

What has teeth but cannot eat? What has teeth but can't eat? What has teeth but cannot eat? What has teeth but can't eat? what has teeth,but can't chew What has teeth but cannot eat? what has teeth,but can'tchew? What has teeth but cannot eat? it has many teeth but no mouth,what is it it has many teeth but no mouth.what is it? what has a lot of teeth but no mouth What has many teeth but never uses them for eating? what has a lot of teeth but no mouth? What has teeth but can't eat?谜语 英语谜语：what has teeth but can ’t bite What has many teeth but never usue them for eating? 英语题：What has teeth but cannot eat? 英语IQ题：what has teeth but cannot eat?