英语智力题：It has legs but can't walk.Whatis it?...

英语智力题：It has legs but can't walk.Whatis it?...
1.It has legs but can't walk.Whatis it?
2.If two cats are in front of a cat and two cats are behind a cat ,and one cat is in the middle ,how many cats are there
3.Bob asks Dan to say any two letters in the 26 letters in English and he can spell a word with the first one and without the second one.After Dan says his letters ,Bob can't say a word.What letters does Dan say?
4.It has hands but no feet ,a face but no eyes.It can tell you time but cannot talk .What is it?
5.The day before the day before yesterday is three days after Saturday.What day is today?
6.What doesn't ask questions,but needs to be answered?
7.what is neither inthehouse nor out of the house,but is a part of the house?
我新手,没分,我的分后一定会追加分的,3Q