106. The stone steps up to the mountain temple had been worn ______ by centuries of visitors from every part of the world.
He is very old,____ he still works very hard.
---You are so lucky. ---What do you mean ____that?
Let's walk over ___the shop on the other side of the street.
_____most students, she was always well prepared and never came to class late.
The doctor will be free ____.