几道全国英语竞赛的智力题

几道全国英语竞赛的智力题1.Rlace two letters in each bracket so they finish the word on the left and start the word on the right.HO(..)ANKI(..)AR2.What has three hands,the second hand really being the third?3.Sam wanted a good night's rest.He went to bed at 8:30 pm,wound up(上紧发条) his 30-year-old alarm clock and set it to wake him up at 9 am.How many hours' sleep did Sam get?回答时请说明原因^-^