106. The stone steps up to the mountain temple had been worn ______ by centuries of visitors from every part of the world.
Do you mind if I ____with my work while you are getting tea ready?
The gentleman does not ____the argument but watches the other guests.
If people keep polluting the rivers, no fish there will survive ___.
____ the weather, the athletic meetings will be held on time.
The ground is slippery. Hold onto the rope and don’t ____.