— Is your father or mother a teachers? —            . My father is a doctor and my mother is an office worker.

In some countries, people eat with chopsticks, while in   , knives and forks.

Our boss is ___ of a musician.

—He got his first book published. It turned out to be a bestseller.                                                                 —When was ________?—______ was in 2000 when he was still in college.  

____ is known to all, persistence is a kind of quality and that’s ____ it takes to do anything well.