If you lack experience, you can _______ it through practice.
In old days, books for blind people used paper ____ against metal wire to form letters.
One winter day ____, he saw the tracks of animals in the snow and observed that the appearance of each one was different.
People from the West like to use these words in cases ____ some people in Asia may not think it necessary.
The manager would like to offer the position to ____ is fit for it.
I am sure ____ he did is wise.