Travelling west, you set your clock ______; travelling east, you set it ahead.
More than_______ of the workers_______from Paris.
My command of Chinese is not________yours.
This colour TV is very expensive, but not_______.
Perseverance is a kind of quality--- and that is _____ it takes to do anything well.
He asked several questions_______ the professor who gave us a lecture_______the balance of nature.