这几道英语谜语谜底是什么?

这几道英语谜语谜底是什么?
1、It is black ,but you say it is clean.
It is white ,but you say it is dirty.
What is it?
2、You go to the park ,and people ask you to show me to them.
What am
3、You can't see me.I can't see you.
When you call,I answer.
When I speak,you listen.
What is it?
4、Maybe it's in the tree;Maybe it's on the ground.
It can fly,itcan sing.
What is it?
5、I have forest but no treees ;moutains;no rocks;cities without houses;rivers without water.
What am
以上还需翻译,比较辛苦,

1.blackboard黑板
他是黑的,但是你说它干净.他是白的,你说它脏.这是什么
2.ticket票
你去公园的时候,被人会让你出示我给他们看.我是什么
3.phone 电话
你看不见我,我看不见你.当你来电,我回答,当你说话,我听.这是什么
4.bird鸟
也许他在树里,也许在地上.它会飞,也会唱.他是什么
5.map地图
我有森林,但是没有树木.有高山,但是没有岩石.有城市,没有房屋,有河流但是没有谁.我是什么