Brain Teasers and Riddle

[Wesley8890]

I love brain teasers and riddles, they always get my mind working so let's see who comes up with the hardest riddle or brainteaser. Hers one to start you off:

 A London cab driver picked up a lady who was a notorious chatterbox. He did not want to engage in conversation, so he pretended to be deaf and dumb. He pointed to his mouth and ears to indicate that he could neither speak nor hear. After she alighted, he pointed to the meter so that she could see how much she owed. She paid him and walked off. Then she realized that he could not have been a deaf mute. How did she know? 

[TalonRider]

The obvious answer would be, he got her to her destination.

[Wesley8890]

I do not speak unless spoken to, many have heard me but none have seen me what am I?

[Valkyrie]

3 hours ago, Wesley8890 said:

I do not speak unless spoken to, many have heard me but none have seen me what am I?

An echo  

[Wesley8890]

What work can one never finish?

Edited September 2, 2017 by Wesley8890