what can hear without ears and answer without a mouth?   字谜语大全及答案

(什么东西没有耳朵却能听，没有嘴巴却能回答你？)

2 what room has no walls,no doors,no windows,and no floors?

(什么“room”没有墙壁也没有门窗、地板？)

3 what is dark but is made by light ?

(什么东西由光引起，但本身却是暗的？)

4 what is easy to get into but hard to get out of ?

(什么进去容易出来难？)

5 what is black when it is clean and white when it is dirty?

(什么东西干净的时候是黑的，脏的时候是白的？)