英语谜语 快~~~~~~~急

1.what has keys but no door?
2.how many sides does an egg have?
3.why does a cat live in the land?
4.what can travel around the world and still stay in one corner?
5.what's happening to everyone in the world at the same time ?
6.when will a net hold water?
7.Mrs Brown has nine children,and half of them are girls.How can this be true?
8.what walks around all day and lies under the bed at night with its tongue hanging out?

1keyboard
2two inside and outside
3
4A stamp
5breath
6when will a net hold water
7The others are also girls.
8our shoes
第三个实在查不到啦

除夕夜守岁：lunar new year's eve the night stays up all night on new year's eve 
提示：打一歇后语。
答案：送旧迎新 ：ringing out the old and ring in the new