professional violinist practices for several hours a day ,but       violinist has his own way of playing the Beethoven concert.

As teachers, we feel         our duty to teach our children to be good wherever we are.

A lot of scientists believe that women’s sense of smell is better developed than ____ of men.

Can you show me ____ pen?   This one is too expensive.

The conflict between Gadhafi’s government army and the rebels in Libya made ______ difficult for the foreigners to leave the country.